25684429479 has 32 divisors (see below), whose sum is σ = 35008796160. Its totient is φ = 16746663552.

The previous prime is 25684429471. The next prime is 25684429513. The reversal of 25684429479 is 97492448652.

It is a happy number.

It is not a de Polignac number, because 25684429479 - 2³ = 25684429471 is a prime.

It is a super-2 number, since 2×25684429479² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25684429471) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12860509 + ... + 12862505.

It is an arithmetic number, because the mean of its divisors is an integer number (1094024880).

Almost surely, 2^25684429479 is an apocalyptic number.

25684429479 is a deficient number, since it is larger than the sum of its proper divisors (9324366681).

25684429479 is a wasteful number, since it uses less digits than its factorization.

25684429479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2599.

The product of its digits is 34836480, while the sum is 60.

The spelling of 25684429479 in words is "twenty-five billion, six hundred eighty-four million, four hundred twenty-nine thousand, four hundred seventy-nine".