25206563157 has 16 divisors (see below), whose sum is σ = 35086656000. Its totient is φ = 16076055744.

The previous prime is 25206563141. The next prime is 25206563177. The reversal of 25206563157 is 75136560252.

It is not a de Polignac number, because 25206563157 - 2⁴ = 25206563141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25206563177) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1319557 + ... + 1338522.

It is an arithmetic number, because the mean of its divisors is an integer number (2192916000).

Almost surely, 2^25206563157 is an apocalyptic number.

It is an amenable number.

25206563157 is a deficient number, since it is larger than the sum of its proper divisors (9880092843).

25206563157 is a wasteful number, since it uses less digits than its factorization.

25206563157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2658220.

The product of its (nonzero) digits is 378000, while the sum is 42.

The spelling of 25206563157 in words is "twenty-five billion, two hundred six million, five hundred sixty-three thousand, one hundred fifty-seven".