25223694438 has 16 divisors (see below), whose sum is σ = 50606532720. Its totient is φ = 8381374176.

The previous prime is 25223694437. The next prime is 25223694539. The reversal of 25223694438 is 83449632252.

It is a super-2 number, since 2×25223694438² (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 (25223694437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6628933 + ... + 6632736.

It is an arithmetic number, because the mean of its divisors is an integer number (3162908295).

Almost surely, 2^25223694438 is an apocalyptic number.

25223694438 is an abundant number, since it is smaller than the sum of its proper divisors (25382838282).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25223694438 is a wasteful number, since it uses less digits than its factorization.

25223694438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13261991.

The product of its digits is 2488320, while the sum is 48.

The spelling of 25223694438 in words is "twenty-five billion, two hundred twenty-three million, six hundred ninety-four thousand, four hundred thirty-eight".