87811505268 has 24 divisors (see below), whose sum is σ = 215677381920. Its totient is φ = 27729948960.

The previous prime is 87811505149. The next prime is 87811505279. The reversal of 87811505268 is 86250511878.

It is a self number, because there is not a number n which added to its sum of digits gives 87811505268.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192568863 + ... + 192569318.

It is an arithmetic number, because the mean of its divisors is an integer number (8986557580).

Almost surely, 2^87811505268 is an apocalyptic number.

It is an amenable number.

87811505268 is an abundant number, since it is smaller than the sum of its proper divisors (127865876652).

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

87811505268 is a wasteful number, since it uses less digits than its factorization.

87811505268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385138207 (or 385138205 counting only the distinct ones).

The product of its (nonzero) digits is 1075200, while the sum is 51.

The spelling of 87811505268 in words is "eighty-seven billion, eight hundred eleven million, five hundred five thousand, two hundred sixty-eight".