25538702772 has 24 divisors (see below), whose sum is σ = 65007607392. Its totient is φ = 7739000800.

The previous prime is 25538702759. The next prime is 25538702797. The reversal of 25538702772 is 27720783552.

It is a congruent number.

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, 96737379 + ... + 96737642.

It is an arithmetic number, because the mean of its divisors is an integer number (2708650308).

Almost surely, 2^25538702772 is an apocalyptic number.

25538702772 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

25538702772 is an abundant number, since it is smaller than the sum of its proper divisors (39468904620).

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

25538702772 is a wasteful number, since it uses less digits than its factorization.

25538702772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193475039 (or 193475037 counting only the distinct ones).

The product of its (nonzero) digits is 1646400, while the sum is 48.

The spelling of 25538702772 in words is "twenty-five billion, five hundred thirty-eight million, seven hundred two thousand, seven hundred seventy-two".