128757257298 has 24 divisors (see below), whose sum is σ = 279222519888. Its totient is φ = 42880860792.

The previous prime is 128757257297. The next prime is 128757257323. The reversal of 128757257298 is 892752757821.

128757257298 is a `hidden beast` number, since 1 + 2 + 8 + 7 + 57 + 2 + 572 + 9 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (128757257297) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3164640 + ... + 3205067.

It is an arithmetic number, because the mean of its divisors is an integer number (11634271662).

Almost surely, 2^128757257298 is an apocalyptic number.

128757257298 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

128757257298 is an abundant number, since it is smaller than the sum of its proper divisors (150465262590).

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

128757257298 is a wasteful number, since it uses less digits than its factorization.

128757257298 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6370838 (or 6370835 counting only the distinct ones).

The product of its digits is 39513600, while the sum is 63.

The spelling of 128757257298 in words is "one hundred twenty-eight billion, seven hundred fifty-seven million, two hundred fifty-seven thousand, two hundred ninety-eight".