25817172323 has 4 divisors (see below), whose sum is σ = 25873175328. Its totient is φ = 25761169320.

The previous prime is 25817172299. The next prime is 25817172379. The reversal of 25817172323 is 32327171852.

It is a happy number.

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 25817172323 - 2²² = 25812978019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25817172223) 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, 28000811 + ... + 28001732.

It is an arithmetic number, because the mean of its divisors is an integer number (6468293832).

Almost surely, 2^25817172323 is an apocalyptic number.

25817172323 is a deficient number, since it is larger than the sum of its proper divisors (56003005).

25817172323 is an equidigital number, since it uses as much as digits as its factorization.

25817172323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56003004.

The product of its digits is 141120, while the sum is 41.

The spelling of 25817172323 in words is "twenty-five billion, eight hundred seventeen million, one hundred seventy-two thousand, three hundred twenty-three".