25917764431 has 16 divisors (see below), whose sum is σ = 28145335680. Its totient is φ = 23724449280.

The previous prime is 25917764413. The next prime is 25917764441. The reversal of 25917764431 is 13446771952.

It is a cyclic number.

It is not a de Polignac number, because 25917764431 - 2²¹ = 25915667279 is a prime.

It is a super-2 number, since 2×25917764431² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25917764441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 731481 + ... + 766093.

It is an arithmetic number, because the mean of its divisors is an integer number (1759083480).

Almost surely, 2^25917764431 is an apocalyptic number.

25917764431 is a deficient number, since it is larger than the sum of its proper divisors (2227571249).

25917764431 is a wasteful number, since it uses less digits than its factorization.

25917764431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35106.

The product of its digits is 1270080, while the sum is 49.

The spelling of 25917764431 in words is "twenty-five billion, nine hundred seventeen million, seven hundred sixty-four thousand, four hundred thirty-one".