87815606512 has 40 divisors (see below), whose sum is σ = 173725175520. Its totient is φ = 42992885760.

The previous prime is 87815606503. The next prime is 87815606533. The reversal of 87815606512 is 21560651878.

It is a super-2 number, since 2×87815606512² (a number of 23 digits) contains 22 as substring.

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, 152689 + ... + 446032.

It is an arithmetic number, because the mean of its divisors is an integer number (4343129388).

Almost surely, 2^87815606512 is an apocalyptic number.

It is an amenable number.

87815606512 is a deficient number, since it is larger than the sum of its proper divisors (85909569008).

87815606512 is a wasteful number, since it uses less digits than its factorization.

87815606512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598921 (or 598915 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 49.

The spelling of 87815606512 in words is "eighty-seven billion, eight hundred fifteen million, six hundred six thousand, five hundred twelve".