25397567280 has 80 divisors (see below), whose sum is σ = 87480516960. Its totient is φ = 6772684032.

The previous prime is 25397567267. The next prime is 25397567297. The reversal of 25397567280 is 8276579352.

25397567280 is a `hidden beast` number, since 2 + 53 + 9 + 7 + 567 + 28 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5876907 + ... + 5881226.

It is an arithmetic number, because the mean of its divisors is an integer number (1093506462).

Almost surely, 2^25397567280 is an apocalyptic number.

25397567280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25397567280 is an abundant number, since it is smaller than the sum of its proper divisors (62082949680).

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

25397567280 is a wasteful number, since it uses less digits than its factorization.

25397567280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11758155 (or 11758143 counting only the distinct ones).

The product of its (nonzero) digits is 6350400, while the sum is 54.

The spelling of 25397567280 in words is "twenty-five billion, three hundred ninety-seven million, five hundred sixty-seven thousand, two hundred eighty".