87700813820 has 12 divisors (see below), whose sum is σ = 184171709064. Its totient is φ = 35080325520.

The previous prime is 87700813819. The next prime is 87700813931. The reversal of 87700813820 is 2831800778.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2192520326 + ... + 2192520365.

It is an arithmetic number, because the mean of its divisors is an integer number (15347642422).

Almost surely, 2^87700813820 is an apocalyptic number.

It is an amenable number.

87700813820 is an abundant number, since it is smaller than the sum of its proper divisors (96470895244).

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

87700813820 is a wasteful number, since it uses less digits than its factorization.

87700813820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4385040700 (or 4385040698 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 44.

The spelling of 87700813820 in words is "eighty-seven billion, seven hundred million, eight hundred thirteen thousand, eight hundred twenty".