25638027879 has 32 divisors (see below), whose sum is σ = 36836303040. Its totient is φ = 15802214400.

The previous prime is 25638027871. The next prime is 25638027893. The reversal of 25638027879 is 97872083652.

It is not a de Polignac number, because 25638027879 - 2³ = 25638027871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25638027871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2574049 + ... + 2583989.

It is an arithmetic number, because the mean of its divisors is an integer number (1151134470).

Almost surely, 2^25638027879 is an apocalyptic number.

25638027879 is a deficient number, since it is larger than the sum of its proper divisors (11198275161).

25638027879 is a wasteful number, since it uses less digits than its factorization.

25638027879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10851.

The product of its (nonzero) digits is 10160640, while the sum is 57.

The spelling of 25638027879 in words is "twenty-five billion, six hundred thirty-eight million, twenty-seven thousand, eight hundred seventy-nine".