25661179116 has 18 divisors (see below), whose sum is σ = 64865758412. Its totient is φ = 8553726360.

The previous prime is 25661179043. The next prime is 25661179127. The reversal of 25661179116 is 61197116652.

25661179116 is a `hidden beast` number, since 2 + 566 + 1 + 1 + 79 + 1 + 16 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×25661179116² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 356405230 + ... + 356405301.

Almost surely, 2^25661179116 is an apocalyptic number.

It is an amenable number.

25661179116 is an abundant number, since it is smaller than the sum of its proper divisors (39204579296).

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

25661179116 is a wasteful number, since it uses less digits than its factorization.

25661179116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712810541 (or 712810536 counting only the distinct ones).

The product of its digits is 136080, while the sum is 45.

The spelling of 25661179116 in words is "twenty-five billion, six hundred sixty-one million, one hundred seventy-nine thousand, one hundred sixteen".