64604755523 has 32 divisors (see below), whose sum is σ = 81756241920. Its totient is φ = 49586895360.

The previous prime is 64604755519. The next prime is 64604755547. The reversal of 64604755523 is 32555740646.

It is a cyclic number.

It is not a de Polignac number, because 64604755523 - 2² = 64604755519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64604755573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4540286 + ... + 4554492.

It is an arithmetic number, because the mean of its divisors is an integer number (2554882560).

Almost surely, 2^64604755523 is an apocalyptic number.

64604755523 is a deficient number, since it is larger than the sum of its proper divisors (17151486397).

64604755523 is a wasteful number, since it uses less digits than its factorization.

64604755523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15107.

The product of its (nonzero) digits is 3024000, while the sum is 47.

The spelling of 64604755523 in words is "sixty-four billion, six hundred four million, seven hundred fifty-five thousand, five hundred twenty-three".