25492854464 has 252 divisors, whose sum is σ = 66420141480. Its totient is φ = 9599385600.

The previous prime is 25492854449. The next prime is 25492854469. The reversal of 25492854464 is 46445829452.

It is not an unprimeable number, because it can be changed into a prime (25492854469) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 33150272 + ... + 33151040.

It is an arithmetic number, because the mean of its divisors is an integer number (263571990).

Almost surely, 2^25492854464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25492854464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33210070740).

25492854464 is an abundant number, since it is smaller than the sum of its proper divisors (40927287016).

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

25492854464 is a wasteful number, since it uses less digits than its factorization.

25492854464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 868 (or 820 counting only the distinct ones).

The product of its digits is 11059200, while the sum is 53.

The spelling of 25492854464 in words is "twenty-five billion, four hundred ninety-two million, eight hundred fifty-four thousand, four hundred sixty-four".