25561772322 has 64 divisors (see below), whose sum is σ = 57567646080. Its totient is φ = 7518928896.

The previous prime is 25561772321. The next prime is 25561772329. The reversal of 25561772322 is 22327716552.

It is not an unprimeable number, because it can be changed into a prime (25561772321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 119998 + ... + 255974.

It is an arithmetic number, because the mean of its divisors is an integer number (899494470).

Almost surely, 2^25561772322 is an apocalyptic number.

25561772322 is an abundant number, since it is smaller than the sum of its proper divisors (32005873758).

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

25561772322 is a wasteful number, since it uses less digits than its factorization.

25561772322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136115.

The product of its digits is 352800, while the sum is 42.

The spelling of 25561772322 in words is "twenty-five billion, five hundred sixty-one million, seven hundred seventy-two thousand, three hundred twenty-two".