128974877955 has 48 divisors (see below), whose sum is σ = 278719743744. Its totient is φ = 53599947840.

The previous prime is 128974877903. The next prime is 128974877957. The reversal of 128974877955 is 559778479821.

128974877955 is a `hidden beast` number, since 1 + 2 + 8 + 97 + 487 + 7 + 9 + 55 = 666.

It is not a de Polignac number, because 128974877955 - 2⁸ = 128974877699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128974877957) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 18607629 + ... + 18614558.

It is an arithmetic number, because the mean of its divisors is an integer number (5806661328).

Almost surely, 2^128974877955 is an apocalyptic number.

128974877955 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

128974877955 is an abundant number, since it is smaller than the sum of its proper divisors (149744865789).

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

128974877955 is a wasteful number, since it uses less digits than its factorization.

128974877955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37222216 (or 37222213 counting only the distinct ones).

The product of its digits is 355622400, while the sum is 72.

The spelling of 128974877955 in words is "one hundred twenty-eight billion, nine hundred seventy-four million, eight hundred seventy-seven thousand, nine hundred fifty-five".