25267117523 has 4 divisors (see below), whose sum is σ = 25372837920. Its totient is φ = 25161397128.

The previous prime is 25267117483. The next prime is 25267117541. The reversal of 25267117523 is 32571176252.

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

It is a cyclic number.

It is not a de Polignac number, because 25267117523 - 2¹⁰ = 25267116499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25267117573) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52859840 + ... + 52860317.

It is an arithmetic number, because the mean of its divisors is an integer number (6343209480).

Almost surely, 2^25267117523 is an apocalyptic number.

25267117523 is a deficient number, since it is larger than the sum of its proper divisors (105720397).

25267117523 is a wasteful number, since it uses less digits than its factorization.

25267117523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105720396.

The product of its digits is 176400, while the sum is 41.

The spelling of 25267117523 in words is "twenty-five billion, two hundred sixty-seven million, one hundred seventeen thousand, five hundred twenty-three".