25245021344 has 48 divisors (see below), whose sum is σ = 50255446248. Its totient is φ = 12481953792.

The previous prime is 25245021343. The next prime is 25245021371. The reversal of 25245021344 is 44312054252.

It can be written as a sum of positive squares in 4 ways, for example, as 20454720400 + 4790300944 = 143020^2 + 69212^2 .

It is a super-2 number, since 2×25245021344² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 25245021344.

It is not an unprimeable number, because it can be changed into a prime (25245021341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4817894 + ... + 4823130.

Almost surely, 2^25245021344 is an apocalyptic number.

It is an amenable number.

25245021344 is a deficient number, since it is larger than the sum of its proper divisors (25010424904).

25245021344 is a wasteful number, since it uses less digits than its factorization.

25245021344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6897 (or 6889 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 32.

Adding to 25245021344 its reverse (44312054252), we get a palindrome (69557075596).

The spelling of 25245021344 in words is "twenty-five billion, two hundred forty-five million, twenty-one thousand, three hundred forty-four".