25256997723 has 16 divisors (see below), whose sum is σ = 34240665600. Its totient is φ = 16555867680.

The previous prime is 25256997707. The next prime is 25256997743. The reversal of 25256997723 is 32779965252.

It is a happy number.

It is not a de Polignac number, because 25256997723 - 2⁴ = 25256997707 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25256997743) 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, 502888 + ... + 550826.

It is an arithmetic number, because the mean of its divisors is an integer number (2140041600).

Almost surely, 2^25256997723 is an apocalyptic number.

25256997723 is a deficient number, since it is larger than the sum of its proper divisors (8983667877).

25256997723 is a wasteful number, since it uses less digits than its factorization.

25256997723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50882.

The product of its digits is 14288400, while the sum is 57.

The spelling of 25256997723 in words is "twenty-five billion, two hundred fifty-six million, nine hundred ninety-seven thousand, seven hundred twenty-three".