25390134555 has 16 divisors (see below), whose sum is σ = 40698495744. Its totient is φ = 13516644960.

The previous prime is 25390134547. The next prime is 25390134613. The reversal of 25390134555 is 55543109352.

It is not a de Polignac number, because 25390134555 - 2³ = 25390134547 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1539031 + ... + 1555440.

It is an arithmetic number, because the mean of its divisors is an integer number (2543655984).

Almost surely, 2^25390134555 is an apocalyptic number.

25390134555 is a deficient number, since it is larger than the sum of its proper divisors (15308361189).

25390134555 is a wasteful number, since it uses less digits than its factorization.

25390134555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3095026.

The product of its (nonzero) digits is 405000, while the sum is 42.

The spelling of 25390134555 in words is "twenty-five billion, three hundred ninety million, one hundred thirty-four thousand, five hundred fifty-five".