25312313444 has 48 divisors (see below), whose sum is σ = 48868626240. Its totient is φ = 11376476160.

The previous prime is 25312313371. The next prime is 25312313491. The reversal of 25312313444 is 44431321352.

It is a super-2 number, since 2×25312313444² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25312313444.

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, 1541027 + ... + 1557365.

It is an arithmetic number, because the mean of its divisors is an integer number (1018096380).

Almost surely, 2^25312313444 is an apocalyptic number.

It is an amenable number.

25312313444 is a deficient number, since it is larger than the sum of its proper divisors (23556312796).

25312313444 is a wasteful number, since it uses less digits than its factorization.

25312313444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16748 (or 16746 counting only the distinct ones).

The product of its digits is 34560, while the sum is 32.

Adding to 25312313444 its reverse (44431321352), we get a palindrome (69743634796).

The spelling of 25312313444 in words is "twenty-five billion, three hundred twelve million, three hundred thirteen thousand, four hundred forty-four".