25223972944 has 20 divisors (see below), whose sum is σ = 48882099520. Its totient is φ = 12609237600.

The previous prime is 25223972929. The next prime is 25223972947. The reversal of 25223972944 is 44927932252.

It is a happy number.

It is a super-2 number, since 2×25223972944² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25223972947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95064 + ... + 243895.

It is an arithmetic number, because the mean of its divisors is an integer number (2444104976).

Almost surely, 2^25223972944 is an apocalyptic number.

It is an amenable number.

25223972944 is a deficient number, since it is larger than the sum of its proper divisors (23658126576).

25223972944 is a wasteful number, since it uses less digits than its factorization.

25223972944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343618 (or 343612 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 49.

The spelling of 25223972944 in words is "twenty-five billion, two hundred twenty-three million, nine hundred seventy-two thousand, nine hundred forty-four".