86640635507 has 16 divisors (see below), whose sum is σ = 93952941984. Its totient is φ = 79594944000.

The previous prime is 86640635503. The next prime is 86640635513. The reversal of 86640635507 is 70553604668.

It is a cyclic number.

It is not a de Polignac number, because 86640635507 - 2² = 86640635503 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86640635503) 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 15 ways as a sum of consecutive naturals, for example, 183044 + ... + 454737.

It is an arithmetic number, because the mean of its divisors is an integer number (5872058874).

Almost surely, 2^86640635507 is an apocalyptic number.

86640635507 is a deficient number, since it is larger than the sum of its proper divisors (7312306477).

86640635507 is a wasteful number, since it uses less digits than its factorization.

86640635507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637990.

The product of its (nonzero) digits is 3628800, while the sum is 50.

The spelling of 86640635507 in words is "eighty-six billion, six hundred forty million, six hundred thirty-five thousand, five hundred seven".