25244145988 has 24 divisors (see below), whose sum is σ = 47230065792. Its totient is φ = 11764258944.

The previous prime is 25244145961. The next prime is 25244145989. The reversal of 25244145988 is 88954144252.

It is a super-2 number, since 2×25244145988² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25244145989) 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, 1795120 + ... + 1809127.

It is an arithmetic number, because the mean of its divisors is an integer number (1967919408).

Almost surely, 2^25244145988 is an apocalyptic number.

It is an amenable number.

25244145988 is a deficient number, since it is larger than the sum of its proper divisors (21985919804).

25244145988 is a wasteful number, since it uses less digits than its factorization.

25244145988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3604371 (or 3604369 counting only the distinct ones).

The product of its digits is 3686400, while the sum is 52.

The spelling of 25244145988 in words is "twenty-five billion, two hundred forty-four million, one hundred forty-five thousand, nine hundred eighty-eight".