64642662535 has 32 divisors (see below), whose sum is σ = 88327314432. Its totient is φ = 44956116480.

The previous prime is 64642662527. The next prime is 64642662569. The reversal of 64642662535 is 53526624646.

It is not a de Polignac number, because 64642662535 - 2³ = 64642662527 is a prime.

It is a super-2 number, since 2×64642662535² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7911022 + ... + 7919188.

It is an arithmetic number, because the mean of its divisors is an integer number (2760228576).

Almost surely, 2^64642662535 is an apocalyptic number.

64642662535 is a deficient number, since it is larger than the sum of its proper divisors (23684651897).

64642662535 is a wasteful number, since it uses less digits than its factorization.

64642662535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14463.

The product of its digits is 6220800, while the sum is 49.

The spelling of 64642662535 in words is "sixty-four billion, six hundred forty-two million, six hundred sixty-two thousand, five hundred thirty-five".