64537470655 has 32 divisors (see below), whose sum is σ = 93253515264. Its totient is φ = 41919140736.

The previous prime is 64537470649. The next prime is 64537470659. The reversal of 64537470655 is 55607473546.

It is a cyclic number.

It is not a de Polignac number, because 64537470655 - 2⁵ = 64537470623 is a prime.

It is a super-2 number, since 2×64537470655² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64537470659) 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, 306264 + ... + 472093.

It is an arithmetic number, because the mean of its divisors is an integer number (2914172352).

Almost surely, 2^64537470655 is an apocalyptic number.

64537470655 is a deficient number, since it is larger than the sum of its proper divisors (28716044609).

64537470655 is a wasteful number, since it uses less digits than its factorization.

64537470655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 778495.

The product of its (nonzero) digits is 10584000, while the sum is 52.

The spelling of 64537470655 in words is "sixty-four billion, five hundred thirty-seven million, four hundred seventy thousand, six hundred fifty-five".