25251711320 has 64 divisors (see below), whose sum is σ = 62125086240. Its totient is φ = 9161164800.

The previous prime is 25251711319. The next prime is 25251711347. The reversal of 25251711320 is 2311715252.

It is a super-2 number, since 2×25251711320² (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, 124250 + ... + 256790.

Almost surely, 2^25251711320 is an apocalyptic number.

25251711320 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 25251711320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31062543120).

25251711320 is an abundant number, since it is smaller than the sum of its proper divisors (36873374920).

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

25251711320 is a wasteful number, since it uses less digits than its factorization.

25251711320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132996 (or 132992 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 29.

The spelling of 25251711320 in words is "twenty-five billion, two hundred fifty-one million, seven hundred eleven thousand, three hundred twenty".