128655646596 has 45 divisors (see below), whose sum is σ = 336348152679. Its totient is φ = 42883063416.

The previous prime is 128655646513. The next prime is 128655646627. The reversal of 128655646596 is 695646556821.

The square root of 128655646596 is 358686.

It is a perfect power (a square), and thus also a powerful number.

128655646596 is a `hidden beast` number, since 1 + 2 + 8 + 6 + 5 + 564 + 65 + 9 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 6446385 + ... + 6466311.

Almost surely, 2^128655646596 is an apocalyptic number.

128655646596 is the 358686-th square number.

It is an amenable number.

128655646596 is an abundant number, since it is smaller than the sum of its proper divisors (207692506083).

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

128655646596 is an frugal number, since it uses more digits than its factorization.

128655646596 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39870 (or 19932 counting only the distinct ones).

The product of its digits is 93312000, while the sum is 63.

The spelling of 128655646596 in words is "one hundred twenty-eight billion, six hundred fifty-five million, six hundred forty-six thousand, five hundred ninety-six".