87905158915 has 24 divisors (see below), whose sum is σ = 122971344912. Its totient is φ = 60148670400.

The previous prime is 87905158877. The next prime is 87905158931. The reversal of 87905158915 is 51985150978.

It is a de Polignac number, because none of the positive numbers 2^k-87905158915 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87905158915.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 269736 + ... + 498565.

It is an arithmetic number, because the mean of its divisors is an integer number (5123806038).

Almost surely, 2^87905158915 is an apocalyptic number.

87905158915 is a deficient number, since it is larger than the sum of its proper divisors (35066185997).

87905158915 is a wasteful number, since it uses less digits than its factorization.

87905158915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 768787 (or 768780 counting only the distinct ones).

The product of its (nonzero) digits is 4536000, while the sum is 58.

The spelling of 87905158915 in words is "eighty-seven billion, nine hundred five million, one hundred fifty-eight thousand, nine hundred fifteen".