25587313438 has 4 divisors (see below), whose sum is σ = 38380970160. Its totient is φ = 12793656718.

The previous prime is 25587313399. The next prime is 25587313441. The reversal of 25587313438 is 83431378552.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 25587313391 and 25587313400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6396828358 + ... + 6396828361.

It is an arithmetic number, because the mean of its divisors is an integer number (9595242540).

Almost surely, 2^25587313438 is an apocalyptic number.

25587313438 is a deficient number, since it is larger than the sum of its proper divisors (12793656722).

25587313438 is a wasteful number, since it uses less digits than its factorization.

25587313438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12793656721.

The product of its digits is 2419200, while the sum is 49.

The spelling of 25587313438 in words is "twenty-five billion, five hundred eighty-seven million, three hundred thirteen thousand, four hundred thirty-eight".