25551664902 has 12 divisors (see below), whose sum is σ = 55361940660. Its totient is φ = 8517221628.

The previous prime is 25551664891. The next prime is 25551664903. The reversal of 25551664902 is 20946615552.

25551664902 is a `hidden beast` number, since 2 + 5 + 551 + 6 + 6 + 4 + 90 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25551664903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 709768452 + ... + 709768487.

It is an arithmetic number, because the mean of its divisors is an integer number (4613495055).

Almost surely, 2^25551664902 is an apocalyptic number.

25551664902 is an abundant number, since it is smaller than the sum of its proper divisors (29810275758).

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

25551664902 is a wasteful number, since it uses less digits than its factorization.

25551664902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1419536947 (or 1419536944 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 45.

The spelling of 25551664902 in words is "twenty-five billion, five hundred fifty-one million, six hundred sixty-four thousand, nine hundred two".