86181572780 has 48 divisors (see below), whose sum is σ = 185470840800. Its totient is φ = 33618163200.

The previous prime is 86181572773. The next prime is 86181572839. The reversal of 86181572780 is 8727518168.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2129171 + ... + 2169269.

It is an arithmetic number, because the mean of its divisors is an integer number (3863975850).

Almost surely, 2^86181572780 is an apocalyptic number.

It is an amenable number.

86181572780 is an abundant number, since it is smaller than the sum of its proper divisors (99289268020).

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

86181572780 is a wasteful number, since it uses less digits than its factorization.

86181572780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42770 (or 42768 counting only the distinct ones).

The product of its (nonzero) digits is 1505280, while the sum is 53.

The spelling of 86181572780 in words is "eighty-six billion, one hundred eighty-one million, five hundred seventy-two thousand, seven hundred eighty".