128656053504 has 108 divisors (see below), whose sum is σ = 404669664672. Its totient is φ = 38986675200.

The previous prime is 128656053479. The next prime is 128656053509. The reversal of 128656053504 is 405350656821.

128656053504 is a `hidden beast` number, since 1 + 2 + 8 + 6 + 5 + 605 + 35 + 0 + 4 = 666.

It is a super-2 number, since 2×128656053504² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 128656053504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128656053509) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2512852 + ... + 2563539.

Almost surely, 2^128656053504 is an apocalyptic number.

It is an amenable number.

128656053504 is an abundant number, since it is smaller than the sum of its proper divisors (276013611168).

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

128656053504 is a wasteful number, since it uses less digits than its factorization.

128656053504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5076424 (or 5076407 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 45.

It can be divided in two parts, 12865 and 6053504, that added together give a square (6066369 = 2463²).

The spelling of 128656053504 in words is "one hundred twenty-eight billion, six hundred fifty-six million, fifty-three thousand, five hundred four".