25257755280 has 40 divisors (see below), whose sum is σ = 78299042112. Its totient is φ = 6735401344.

The previous prime is 25257755261. The next prime is 25257755311. The reversal of 25257755280 is 8255775252.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52620084 + ... + 52620563.

Almost surely, 2^25257755280 is an apocalyptic number.

25257755280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25257755280 is an abundant number, since it is smaller than the sum of its proper divisors (53041286832).

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

25257755280 is a wasteful number, since it uses less digits than its factorization.

25257755280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105240663 (or 105240657 counting only the distinct ones).

The product of its (nonzero) digits is 1960000, while the sum is 48.

The spelling of 25257755280 in words is "twenty-five billion, two hundred fifty-seven million, seven hundred fifty-five thousand, two hundred eighty".