25399648875 has 32 divisors (see below), whose sum is σ = 44489502720. Its totient is φ = 12833503200.

The previous prime is 25399648793. The next prime is 25399648877. The reversal of 25399648875 is 57884699352.

It is not a de Polignac number, because 25399648875 - 2⁹ = 25399648363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25399648877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1775307 + ... + 1789556.

It is an arithmetic number, because the mean of its divisors is an integer number (1390296960).

Almost surely, 2^25399648875 is an apocalyptic number.

25399648875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

25399648875 is a deficient number, since it is larger than the sum of its proper divisors (19089853845).

25399648875 is a wasteful number, since it uses less digits than its factorization.

25399648875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3564900 (or 3564890 counting only the distinct ones).

The product of its digits is 130636800, while the sum is 66.

The spelling of 25399648875 in words is "twenty-five billion, three hundred ninety-nine million, six hundred forty-eight thousand, eight hundred seventy-five".