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645610414553 = 13174762155619
BaseRepresentation
bin10010110010100010110…
…00010010000111011001
32021201102200220011220022
421121101120102013121
541034202231231203
61212331143440225
764433553656366
oct11312130220731
92251380804808
10645610414553
11229890280085
12a5159756075
1348b5b1726a0
1423367a0b46d
1511bd9184a38
hex96516121d9

645610414553 has 16 divisors (see below), whose sum is σ = 751834379520. Its totient is φ = 548958418176.

The previous prime is 645610414549. The next prime is 645610414567. The reversal of 645610414553 is 355414016546.

It is a cyclic number.

It is not a de Polignac number, because 645610414553 - 22 = 645610414549 is a prime.

It is not an unprimeable number, because it can be changed into a prime (645610414573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31067423 + ... + 31088196.

It is an arithmetic number, because the mean of its divisors is an integer number (46989648720).

Almost surely, 2645610414553 is an apocalyptic number.

It is an amenable number.

645610414553 is a deficient number, since it is larger than the sum of its proper divisors (106223964967).

645610414553 is a wasteful number, since it uses less digits than its factorization.

645610414553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62155696.

The product of its (nonzero) digits is 864000, while the sum is 44.

The spelling of 645610414553 in words is "six hundred forty-five billion, six hundred ten million, four hundred fourteen thousand, five hundred fifty-three".

Divisors: 1 13 17 47 221 611 799 10387 62155619 808023047 1056645523 2921314093 13736391799 37977083209 49662339581 645610414553