86191855880 has 32 divisors (see below), whose sum is σ = 208849498200. Its totient is φ = 31824685056.

The previous prime is 86191855861. The next prime is 86191855909. The reversal of 86191855880 is 8855819168.

It can be written as a sum of positive squares in 4 ways, for example, as 62121574564 + 24070281316 = 249242^2 + 155146^2 .

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, 82876265 + ... + 82877304.

Almost surely, 2^86191855880 is an apocalyptic number.

It is an amenable number.

86191855880 is an abundant number, since it is smaller than the sum of its proper divisors (122657642320).

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

86191855880 is a wasteful number, since it uses less digits than its factorization.

86191855880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165753593 (or 165753589 counting only the distinct ones).

The product of its (nonzero) digits is 5529600, while the sum is 59.

The spelling of 86191855880 in words is "eighty-six billion, one hundred ninety-one million, eight hundred fifty-five thousand, eight hundred eighty".