87061256504013 has 32 divisors (see below), whose sum is σ = 134437429416960. Its totient is φ = 49529579016960.

The previous prime is 87061256504009. The next prime is 87061256504071. The reversal of 87061256504013 is 31040565216078.

It is not a de Polignac number, because 87061256504013 - 2² = 87061256504009 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87061256504083) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 204522745 + ... + 204947982.

It is an arithmetic number, because the mean of its divisors is an integer number (4201169669280).

Almost surely, 2^{87061256504013} is an apocalyptic number.

It is an amenable number.

87061256504013 is a deficient number, since it is larger than the sum of its proper divisors (47376172912947).

87061256504013 is a wasteful number, since it uses less digits than its factorization.

87061256504013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409471137.

The product of its (nonzero) digits is 1209600, while the sum is 48.

The spelling of 87061256504013 in words is "eighty-seven trillion, sixty-one billion, two hundred fifty-six million, five hundred four thousand, thirteen".