25456057720 has 128 divisors (see below), whose sum is σ = 63218180160. Its totient is φ = 9184665600.

The previous prime is 25456057643. The next prime is 25456057721. The reversal of 25456057720 is 2775065452.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25456057721) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1678170 + ... + 1693270.

Almost surely, 2^25456057720 is an apocalyptic number.

25456057720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25456057720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31609090080).

25456057720 is an abundant number, since it is smaller than the sum of its proper divisors (37762122440).

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

25456057720 is a wasteful number, since it uses less digits than its factorization.

25456057720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15233 (or 15229 counting only the distinct ones).

The product of its (nonzero) digits is 588000, while the sum is 43.

The spelling of 25456057720 in words is "twenty-five billion, four hundred fifty-six million, fifty-seven thousand, seven hundred twenty".