128313945756 has 72 divisors (see below), whose sum is σ = 325162275984. Its totient is φ = 42664239360.

The previous prime is 128313945611. The next prime is 128313945769. The reversal of 128313945756 is 657549313821.

It is a happy number.

128313945756 is a `hidden beast` number, since 1 + 2 + 8 + 3 + 139 + 457 + 56 = 666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28787080 + ... + 28791536.

It is an arithmetic number, because the mean of its divisors is an integer number (4516142722).

Almost surely, 2^128313945756 is an apocalyptic number.

It is an amenable number.

128313945756 is an abundant number, since it is smaller than the sum of its proper divisors (196848330228).

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

128313945756 is a wasteful number, since it uses less digits than its factorization.

128313945756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6291 (or 6286 counting only the distinct ones).

The product of its digits is 5443200, while the sum is 54.

The spelling of 128313945756 in words is "one hundred twenty-eight billion, three hundred thirteen million, nine hundred forty-five thousand, seven hundred fifty-six".