128658976672 has 48 divisors (see below), whose sum is σ = 270999842400. Its totient is φ = 59944631040.

The previous prime is 128658976651. The next prime is 128658976697. The reversal of 128658976672 is 276679856821.

It is a junction number, because it is equal to n+sod(n) for n = 128658976598 and 128658976607.

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, 1697422 + ... + 1771597.

It is an arithmetic number, because the mean of its divisors is an integer number (5645830050).

Almost surely, 2^128658976672 is an apocalyptic number.

It is an amenable number.

128658976672 is an abundant number, since it is smaller than the sum of its proper divisors (142340865728).

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

128658976672 is a wasteful number, since it uses less digits than its factorization.

128658976672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3469109 (or 3469101 counting only the distinct ones).

The product of its digits is 121927680, while the sum is 67.

The spelling of 128658976672 in words is "one hundred twenty-eight billion, six hundred fifty-eight million, nine hundred seventy-six thousand, six hundred seventy-two".