25709117112 has 96 divisors (see below), whose sum is σ = 79599636480. Its totient is φ = 7343265600.

The previous prime is 25709117087. The next prime is 25709117243. The reversal of 25709117112 is 21171190752.

25709117112 is a `hidden beast` number, since 2 + 570 + 9 + 1 + 1 + 71 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2490153 + ... + 2500455.

It is an arithmetic number, because the mean of its divisors is an integer number (829162880).

Almost surely, 2^25709117112 is an apocalyptic number.

It is an amenable number.

25709117112 is an abundant number, since it is smaller than the sum of its proper divisors (53890519368).

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

25709117112 is a wasteful number, since it uses less digits than its factorization.

25709117112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15273 (or 15266 counting only the distinct ones).

The product of its (nonzero) digits is 8820, while the sum is 36.

The spelling of 25709117112 in words is "twenty-five billion, seven hundred nine million, one hundred seventeen thousand, one hundred twelve".