128731992920124 has 96 divisors (see below), whose sum is σ = 346981322612736. Its totient is φ = 36712413511680.

The previous prime is 128731992920101. The next prime is 128731992920149. The reversal of 128731992920124 is 421029299137821.

It is a hoax number, since the sum of its digits (60) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29861532 + ... + 33899484.

It is an arithmetic number, because the mean of its divisors is an integer number (3614388777216).

Almost surely, 2^{128731992920124} is an apocalyptic number.

It is an amenable number.

128731992920124 is an abundant number, since it is smaller than the sum of its proper divisors (218249329692612).

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

128731992920124 is a wasteful number, since it uses less digits than its factorization.

128731992920124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4052195 (or 4052193 counting only the distinct ones).

The product of its (nonzero) digits is 7838208, while the sum is 60.

The spelling of 128731992920124 in words is "one hundred twenty-eight trillion, seven hundred thirty-one billion, nine hundred ninety-two million, nine hundred twenty thousand, one hundred twenty-four".