25979177568 has 48 divisors (see below), whose sum is σ = 68206014576. Its totient is φ = 8658370560.

The previous prime is 25979177513. The next prime is 25979177593. The reversal of 25979177568 is 86577197952.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a junction number, because it is equal to n+sod(n) for n = 25979177499 and 25979177508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 735480 + ... + 769992.

It is an arithmetic number, because the mean of its divisors is an integer number (1420958637).

Almost surely, 2^25979177568 is an apocalyptic number.

It is an amenable number.

25979177568 is an abundant number, since it is smaller than the sum of its proper divisors (42226837008).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25979177568 is a wasteful number, since it uses less digits than its factorization.

25979177568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42367 (or 42359 counting only the distinct ones).

The product of its digits is 66679200, while the sum is 66.

The spelling of 25979177568 in words is "twenty-five billion, nine hundred seventy-nine million, one hundred seventy-seven thousand, five hundred sixty-eight".