55757664 has 36 divisors (see below), whose sum is σ = 158561676. Its totient is φ = 18585792.

The previous prime is 55757659. The next prime is 55757683. The reversal of 55757664 is 46675755.

55757664 is a `hidden beast` number, since 5 + 575 + 76 + 6 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 96514 + ... + 97089.

It is an arithmetic number, because the mean of its divisors is an integer number (4404491).

Almost surely, 2^55757664 is an apocalyptic number.

It is an amenable number.

55757664 is an abundant number, since it is smaller than the sum of its proper divisors (102804012).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55757664 is a wasteful number, since it uses less digits than its factorization.

55757664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193619 (or 193608 counting only the distinct ones).

The product of its digits is 882000, while the sum is 45.

The square root of 55757664 is about 7467.1054632970. The cubic root of 55757664 is about 382.0335670365.

The spelling of 55757664 in words is "fifty-five million, seven hundred fifty-seven thousand, six hundred sixty-four".