25660458879 has 16 divisors (see below), whose sum is σ = 37457144064. Its totient is φ = 15496443200.

The previous prime is 25660458877. The next prime is 25660458883. The reversal of 25660458879 is 97885406652.

It is a cyclic number.

It is not a de Polignac number, because 25660458879 - 2¹ = 25660458877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25660458877) 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, 1374339 + ... + 1392884.

It is an arithmetic number, because the mean of its divisors is an integer number (2341071504).

Almost surely, 2^25660458879 is an apocalyptic number.

25660458879 is a deficient number, since it is larger than the sum of its proper divisors (11796685185).

25660458879 is a wasteful number, since it uses less digits than its factorization.

25660458879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2767518.

The product of its (nonzero) digits is 29030400, while the sum is 60.

The spelling of 25660458879 in words is "twenty-five billion, six hundred sixty million, four hundred fifty-eight thousand, eight hundred seventy-nine".