25431257852 has 96 divisors (see below), whose sum is σ = 60371512320. Its totient is φ = 9051678720.

The previous prime is 25431257791. The next prime is 25431257897. The reversal of 25431257852 is 25875213452.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 355649 + ... + 421127.

It is an arithmetic number, because the mean of its divisors is an integer number (628869920).

Almost surely, 2^25431257852 is an apocalyptic number.

25431257852 is a gapful number since it is divisible by the number (22) 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 25431257852, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30185756160).

25431257852 is an abundant number, since it is smaller than the sum of its proper divisors (34940254468).

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

25431257852 is a wasteful number, since it uses less digits than its factorization.

25431257852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65611 (or 65609 counting only the distinct ones).

The product of its digits is 672000, while the sum is 44.

The spelling of 25431257852 in words is "twenty-five billion, four hundred thirty-one million, two hundred fifty-seven thousand, eight hundred fifty-two".