25257216570 has 32 divisors (see below), whose sum is σ = 60640671168. Its totient is φ = 6732663168.

The previous prime is 25257216539. The next prime is 25257216577. The reversal of 25257216570 is 7561275252.

It is not an unprimeable number, because it can be changed into a prime (25257216577) by changing a digit.

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, 82344 + ... + 239363.

It is an arithmetic number, because the mean of its divisors is an integer number (1895020974).

Almost surely, 2^25257216570 is an apocalyptic number.

25257216570 is an abundant number, since it is smaller than the sum of its proper divisors (35383454598).

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

25257216570 is a wasteful number, since it uses less digits than its factorization.

25257216570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324334.

The product of its (nonzero) digits is 294000, while the sum is 42.

The spelling of 25257216570 in words is "twenty-five billion, two hundred fifty-seven million, two hundred sixteen thousand, five hundred seventy".