25461397052 has 36 divisors (see below), whose sum is σ = 55819222200. Its totient is φ = 10072639584.

The previous prime is 25461397043. The next prime is 25461397067. The reversal of 25461397052 is 25079316452.

It is a junction number, because it is equal to n+sod(n) for n = 25461396994 and 25461397012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4993802 + ... + 4998897.

It is an arithmetic number, because the mean of its divisors is an integer number (1550533950).

Almost surely, 2^25461397052 is an apocalyptic number.

It is an amenable number.

25461397052 is an abundant number, since it is smaller than the sum of its proper divisors (30357825148).

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

25461397052 is a wasteful number, since it uses less digits than its factorization.

25461397052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9992730 (or 9992721 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 44.

The spelling of 25461397052 in words is "twenty-five billion, four hundred sixty-one million, three hundred ninety-seven thousand, fifty-two".