25756252564 has 48 divisors (see below), whose sum is σ = 53815910400. Its totient is φ = 10545945696.

The previous prime is 25756252547. The next prime is 25756252649. The reversal of 25756252564 is 46525265752.

It is a super-2 number, since 2×25756252564² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 529917 + ... + 576475.

It is an arithmetic number, because the mean of its divisors is an integer number (1121164800).

Almost surely, 2^25756252564 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 25756252564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26907955200).

25756252564 is an abundant number, since it is smaller than the sum of its proper divisors (28059657836).

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

25756252564 is a wasteful number, since it uses less digits than its factorization.

25756252564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47452 (or 47450 counting only the distinct ones).

The product of its digits is 5040000, while the sum is 49.

The spelling of 25756252564 in words is "twenty-five billion, seven hundred fifty-six million, two hundred fifty-two thousand, five hundred sixty-four".