25791761137 has 4 divisors (see below), whose sum is σ = 26913142080. Its totient is φ = 24670380196.

The previous prime is 25791761027. The next prime is 25791761161. The reversal of 25791761137 is 73116719752.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25791761137 - 2²³ = 25783372529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25791761167) 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, 560690437 + ... + 560690482.

It is an arithmetic number, because the mean of its divisors is an integer number (6728285520).

Almost surely, 2^25791761137 is an apocalyptic number.

It is an amenable number.

25791761137 is a deficient number, since it is larger than the sum of its proper divisors (1121380943).

25791761137 is a wasteful number, since it uses less digits than its factorization.

25791761137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1121380942.

The product of its digits is 555660, while the sum is 49.

The spelling of 25791761137 in words is "twenty-five billion, seven hundred ninety-one million, seven hundred sixty-one thousand, one hundred thirty-seven".