87121590572 has 24 divisors (see below), whose sum is σ = 153009630480. Its totient is φ = 43404672960.

The previous prime is 87121590553. The next prime is 87121590601. The reversal of 87121590572 is 27509512178.

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, 3205922 + ... + 3232982.

It is an arithmetic number, because the mean of its divisors is an integer number (6375401270).

Almost surely, 2^87121590572 is an apocalyptic number.

It is an amenable number.

87121590572 is a deficient number, since it is larger than the sum of its proper divisors (65888039908).

87121590572 is a wasteful number, since it uses less digits than its factorization.

87121590572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29921 (or 29919 counting only the distinct ones).

The product of its (nonzero) digits is 352800, while the sum is 47.

The spelling of 87121590572 in words is "eighty-seven billion, one hundred twenty-one million, five hundred ninety thousand, five hundred seventy-two".