25933422161 has 4 divisors (see below), whose sum is σ = 25933749300. Its totient is φ = 25933095024.

The previous prime is 25933422113. The next prime is 25933422169. The reversal of 25933422161 is 16122433952.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 8126121025 + 17807301136 = 90145^2 + 133444^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25933422161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25933422169) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38795 + ... + 231023.

It is an arithmetic number, because the mean of its divisors is an integer number (6483437325).

Almost surely, 2^25933422161 is an apocalyptic number.

It is an amenable number.

25933422161 is a deficient number, since it is larger than the sum of its proper divisors (327139).

25933422161 is a wasteful number, since it uses less digits than its factorization.

25933422161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327138.

The product of its digits is 77760, while the sum is 38.

The spelling of 25933422161 in words is "twenty-five billion, nine hundred thirty-three million, four hundred twenty-two thousand, one hundred sixty-one".