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55645765 = 5715110529
BaseRepresentation
bin1101010001000…
…1011001000101
310212201002122021
43110101121011
5103221131030
65304403141
71243660360
oct324213105
9125632567
1055645765
112945753a
12167764b1
13b6b40b6
1475670d7
154d4297a
hex3511645

55645765 has 16 divisors (see below), whose sum is σ = 76826880. Its totient is φ = 37900800.

The previous prime is 55645757. The next prime is 55645771. The reversal of 55645765 is 56754655.

It is not a de Polignac number, because 55645765 - 23 = 55645757 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21 + ... + 10549.

It is an arithmetic number, because the mean of its divisors is an integer number (4801680).

Almost surely, 255645765 is an apocalyptic number.

It is an amenable number.

55645765 is a deficient number, since it is larger than the sum of its proper divisors (21181115).

55645765 is a wasteful number, since it uses less digits than its factorization.

55645765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10692.

The product of its digits is 630000, while the sum is 43.

The square root of 55645765 is about 7459.6089039574. The cubic root of 55645765 is about 381.7778305722. Note that the first 3 decimals are identical.

The spelling of 55645765 in words is "fifty-five million, six hundred forty-five thousand, seven hundred sixty-five".

Divisors: 1 5 7 35 151 755 1057 5285 10529 52645 73703 368515 1589879 7949395 11129153 55645765