25257457454 has 16 divisors (see below), whose sum is σ = 39884442000. Its totient is φ = 11962785024.

The previous prime is 25257457409. The next prime is 25257457469. The reversal of 25257457454 is 45475475252.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 393854 + ... + 453470.

It is an arithmetic number, because the mean of its divisors is an integer number (2492777625).

Almost surely, 2^25257457454 is an apocalyptic number.

25257457454 is a deficient number, since it is larger than the sum of its proper divisors (14626984546).

25257457454 is a wasteful number, since it uses less digits than its factorization.

25257457454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70787.

The product of its digits is 7840000, while the sum is 50.

The spelling of 25257457454 in words is "twenty-five billion, two hundred fifty-seven million, four hundred fifty-seven thousand, four hundred fifty-four".