25915223412 has 72 divisors (see below), whose sum is σ = 73614288384. Its totient is φ = 7627219776.

The previous prime is 25915223353. The next prime is 25915223441. The reversal of 25915223412 is 21432251952.

25915223412 is a `hidden beast` number, since 2 + 5 + 9 + 15 + 223 + 412 = 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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1193028 + ... + 1214555.

It is an arithmetic number, because the mean of its divisors is an integer number (1022420672).

Almost surely, 2^25915223412 is an apocalyptic number.

It is an amenable number.

25915223412 is an abundant number, since it is smaller than the sum of its proper divisors (47699064972).

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

25915223412 is a wasteful number, since it uses less digits than its factorization.

25915223412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2407629 (or 2407624 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The spelling of 25915223412 in words is "twenty-five billion, nine hundred fifteen million, two hundred twenty-three thousand, four hundred twelve".