128126976525 has 60 divisors (see below), whose sum is σ = 244991553664. Its totient is φ = 66130020000.

The previous prime is 128126976521. The next prime is 128126976581. The reversal of 128126976525 is 525679621821.

128126976525 is a `hidden beast` number, since 1 + 2 + 8 + 1 + 26 + 97 + 6 + 525 = 666.

It is not a de Polignac number, because 128126976525 - 2² = 128126976521 is a prime.

It is a super-2 number, since 2×128126976525² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128126976521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 957751 + ... + 1083300.

Almost surely, 2^128126976525 is an apocalyptic number.

128126976525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

128126976525 is a deficient number, since it is larger than the sum of its proper divisors (116864577139).

128126976525 is a wasteful number, since it uses less digits than its factorization.

128126976525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2041104 (or 2041090 counting only the distinct ones).

The product of its digits is 3628800, while the sum is 54.

The spelling of 128126976525 in words is "one hundred twenty-eight billion, one hundred twenty-six million, nine hundred seventy-six thousand, five hundred twenty-five".