25570979685 has 12 divisors (see below), whose sum is σ = 44323031532. Its totient is φ = 13637855808.

The previous prime is 25570979677. The next prime is 25570979723. The reversal of 25570979685 is 58697907552.

25570979685 is a `hidden beast` number, since 2 + 557 + 0 + 9 + 79 + 6 + 8 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 14904014724 + 10666964961 = 122082^2 + 103281^2 .

It is not a de Polignac number, because 25570979685 - 2³ = 25570979677 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 284121952 + ... + 284122041.

It is an arithmetic number, because the mean of its divisors is an integer number (3693585961).

Almost surely, 2^25570979685 is an apocalyptic number.

It is an amenable number.

25570979685 is a deficient number, since it is larger than the sum of its proper divisors (18752051847).

25570979685 is a wasteful number, since it uses less digits than its factorization.

25570979685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 568244004 (or 568244001 counting only the distinct ones).

The product of its (nonzero) digits is 47628000, while the sum is 63.

The spelling of 25570979685 in words is "twenty-five billion, five hundred seventy million, nine hundred seventy-nine thousand, six hundred eighty-five".