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1285434485918 = 2113110130836053
BaseRepresentation
bin10010101101001001110…
…111011010110010011110
311112212221010202200011122
4102231021313122302132
5132030032212022133
62422304230050542
7161604156564632
oct22551167326236
94485833680148
101285434485918
1145617128a950
121891614a9a52
13942a65a575b
1446302d44dc2
1523685337498
hex12b49ddac9e

1285434485918 has 64 divisors (see below), whose sum is σ = 2193862662144. Its totient is φ = 559567920000.

The previous prime is 1285434485917. The next prime is 1285434485927. The reversal of 1285434485918 is 8195844345821.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (62).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285434485917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 212360180 + ... + 212366232.

It is an arithmetic number, because the mean of its divisors is an integer number (34279104096).

Almost surely, 21285434485918 is an apocalyptic number.

1285434485918 is a deficient number, since it is larger than the sum of its proper divisors (908428176226).

1285434485918 is a wasteful number, since it uses less digits than its factorization.

1285434485918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9281.

The product of its digits is 44236800, while the sum is 62.

The spelling of 1285434485918 in words is "one trillion, two hundred eighty-five billion, four hundred thirty-four million, four hundred eighty-five thousand, nine hundred eighteen".

Divisors: 1 2 11 22 31 62 101 202 341 682 1111 2222 3083 3131 6053 6166 6262 12106 33913 34441 66583 67826 68882 95573 133166 187643 191146 311383 375286 611353 622766 1051303 1222706 2064073 2102606 3425213 4128146 6724883 6850426 9652873 13449766 18661399 18951943 19305746 37322798 37903886 106181603 205275389 208471373 212363206 410550778 416942746 578503369 1157006738 1884801299 3769602598 6363537059 12727074118 20732814289 41465628578 58428840269 116857680538 642717242959 1285434485918