25615422164431 has 4 divisors (see below), whose sum is σ = 27944096906664. Its totient is φ = 23286747422200.

The previous prime is 25615422164417. The next prime is 25615422164443. The reversal of 25615422164431 is 13446122451652.

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 25615422164431 - 2¹¹ = 25615422162383 is a prime.

It is a super-2 number, since 2×25615422164431² (a number of 28 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 (25615422164401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1164337371100 + ... + 1164337371121.

It is an arithmetic number, because the mean of its divisors is an integer number (6986024226666).

Almost surely, 2^{25615422164431} is an apocalyptic number.

25615422164431 is a deficient number, since it is larger than the sum of its proper divisors (2328674742233).

25615422164431 is a wasteful number, since it uses less digits than its factorization.

25615422164431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2328674742232.

The product of its digits is 1382400, while the sum is 46.

The spelling of 25615422164431 in words is "twenty-five trillion, six hundred fifteen billion, four hundred twenty-two million, one hundred sixty-four thousand, four hundred thirty-one".