25516522254 has 16 divisors (see below), whose sum is σ = 51045622992. Its totient is φ = 8503411008.

The previous prime is 25516522217. The next prime is 25516522267. The reversal of 25516522254 is 45222561552.

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, 497629 + ... + 546504.

It is an arithmetic number, because the mean of its divisors is an integer number (3190351437).

Almost surely, 2^25516522254 is an apocalyptic number.

25516522254 is an abundant number, since it is smaller than the sum of its proper divisors (25529100738).

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

25516522254 is a wasteful number, since it uses less digits than its factorization.

25516522254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1048211.

The product of its digits is 240000, while the sum is 39.

The spelling of 25516522254 in words is "twenty-five billion, five hundred sixteen million, five hundred twenty-two thousand, two hundred fifty-four".