128700249732 has 60 divisors (see below), whose sum is σ = 337350196876. Its totient is φ = 42785029440.

The previous prime is 128700249731. The next prime is 128700249737. The reversal of 128700249732 is 237942007821.

128700249732 is a `hidden beast` number, since 128 + 7 + 0 + 0 + 2 + 497 + 32 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 97284105216 + 31416144516 = 311904^2 + 177246^2 .

It is not an unprimeable number, because it can be changed into a prime (128700249731) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 411619 + ... + 653322.

Almost surely, 2^128700249732 is an apocalyptic number.

128700249732 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

128700249732 is an abundant number, since it is smaller than the sum of its proper divisors (208649947144).

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

128700249732 is a wasteful number, since it uses less digits than its factorization.

128700249732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1065330 (or 1065319 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The spelling of 128700249732 in words is "one hundred twenty-eight billion, seven hundred million, two hundred forty-nine thousand, seven hundred thirty-two".