86181631728 has 20 divisors (see below), whose sum is σ = 222635882088. Its totient is φ = 28727210560.

The previous prime is 86181631717. The next prime is 86181631751. The reversal of 86181631728 is 82713618168.

It is a happy number.

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, 897725283 + ... + 897725378.

Almost surely, 2^86181631728 is an apocalyptic number.

It is an amenable number.

86181631728 is an abundant number, since it is smaller than the sum of its proper divisors (136454250360).

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

86181631728 is a wasteful number, since it uses less digits than its factorization.

86181631728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1795450672 (or 1795450666 counting only the distinct ones).

The product of its digits is 774144, while the sum is 51.

The spelling of 86181631728 in words is "eighty-six billion, one hundred eighty-one million, six hundred thirty-one thousand, seven hundred twenty-eight".