25687771484 has 12 divisors (see below), whose sum is σ = 45005696064. Its totient is φ = 12829001184.

The previous prime is 25687771453. The next prime is 25687771493. The reversal of 25687771484 is 48417778652.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3717257 + ... + 3724160.

It is an arithmetic number, because the mean of its divisors is an integer number (3750474672).

Almost surely, 2^25687771484 is an apocalyptic number.

It is an amenable number.

25687771484 is a deficient number, since it is larger than the sum of its proper divisors (19317924580).

25687771484 is a wasteful number, since it uses less digits than its factorization.

25687771484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7442284 (or 7442282 counting only the distinct ones).

The product of its digits is 21073920, while the sum is 59.

The spelling of 25687771484 in words is "twenty-five billion, six hundred eighty-seven million, seven hundred seventy-one thousand, four hundred eighty-four".