128874988456 has 8 divisors (see below), whose sum is σ = 241640603370. Its totient is φ = 64437494224.

The previous prime is 128874988453. The next prime is 128874988481. The reversal of 128874988456 is 654889478821.

It can be written as a sum of positive squares in only one way, i.e., 115305068356 + 13569920100 = 339566^2 + 116490^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (128874988453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8054686771 + ... + 8054686786.

Almost surely, 2^128874988456 is an apocalyptic number.

It is an amenable number.

128874988456 is a deficient number, since it is larger than the sum of its proper divisors (112765614914).

128874988456 is a wasteful number, since it uses less digits than its factorization.

128874988456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16109373563 (or 16109373559 counting only the distinct ones).

The product of its digits is 247726080, while the sum is 70.

The spelling of 128874988456 in words is "one hundred twenty-eight billion, eight hundred seventy-four million, nine hundred eighty-eight thousand, four hundred fifty-six".