87693639678 has 24 divisors (see below), whose sum is σ = 190319054016. Its totient is φ = 29182572000.

The previous prime is 87693639641. The next prime is 87693639679.

87693639678 is a `hidden beast` number, since 87 + 6 + 93 + 6 + 396 + 78 = 666.

87693639678 is nontrivially palindromic in base 10.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87693639679) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4042318 + ... + 4063953.

It is an arithmetic number, because the mean of its divisors is an integer number (7929960584).

Almost surely, 2^87693639678 is an apocalyptic number.

87693639678 is an abundant number, since it is smaller than the sum of its proper divisors (102625414338).

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

87693639678 is a wasteful number, since it uses less digits than its factorization.

87693639678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8106880 (or 8106877 counting only the distinct ones).

The product of its digits is 493807104, while the sum is 72.

The spelling of 87693639678 in words is "eighty-seven billion, six hundred ninety-three million, six hundred thirty-nine thousand, six hundred seventy-eight".