25520157879 has 16 divisors (see below), whose sum is σ = 34108905600. Its totient is φ = 16972473056.

The previous prime is 25520157851. The next prime is 25520157907. The reversal of 25520157879 is 97875102552.

It is an interprime number because it is at equal distance from previous prime (25520157851) and next prime (25520157907).

It is a cyclic number.

It is not a de Polignac number, because 25520157879 - 2⁸ = 25520157623 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25520157079) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2483917 + ... + 2494169.

It is an arithmetic number, because the mean of its divisors is an integer number (2131806600).

Almost surely, 2^25520157879 is an apocalyptic number.

25520157879 is a deficient number, since it is larger than the sum of its proper divisors (8588747721).

25520157879 is a wasteful number, since it uses less digits than its factorization.

25520157879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12174.

The product of its (nonzero) digits is 1764000, while the sum is 51.

The spelling of 25520157879 in words is "twenty-five billion, five hundred twenty million, one hundred fifty-seven thousand, eight hundred seventy-nine".