128634045525 has 36 divisors (see below), whose sum is σ = 236624852932. Its totient is φ = 66750635520.

The previous prime is 128634045521. The next prime is 128634045559. The reversal of 128634045525 is 525540436821.

128634045525 is a `hidden beast` number, since 1 + 2 + 8 + 634 + 0 + 4 + 5 + 5 + 2 + 5 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 12646801764 + 115987243761 = 112458^2 + 340569^2 .

It is not a de Polignac number, because 128634045525 - 2² = 128634045521 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128634045521) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 7717444 + ... + 7734093.

Almost surely, 2^128634045525 is an apocalyptic number.

128634045525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

128634045525 is a deficient number, since it is larger than the sum of its proper divisors (107990807407).

128634045525 is a wasteful number, since it uses less digits than its factorization.

128634045525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15451590 (or 15451582 counting only the distinct ones).

The product of its (nonzero) digits is 1152000, while the sum is 45.

The spelling of 128634045525 in words is "one hundred twenty-eight billion, six hundred thirty-four million, forty-five thousand, five hundred twenty-five".