25938315761 has 4 divisors (see below), whose sum is σ = 26303644224. Its totient is φ = 25572987300.

The previous prime is 25938315719. The next prime is 25938315787. The reversal of 25938315761 is 16751383952.

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 25938315761 - 2²² = 25934121457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25938315791) 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, 182664125 + ... + 182664266.

It is an arithmetic number, because the mean of its divisors is an integer number (6575911056).

Almost surely, 2^25938315761 is an apocalyptic number.

It is an amenable number.

25938315761 is a deficient number, since it is larger than the sum of its proper divisors (365328463).

25938315761 is an equidigital number, since it uses as much as digits as its factorization.

25938315761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365328462.

The product of its digits is 1360800, while the sum is 50.

The spelling of 25938315761 in words is "twenty-five billion, nine hundred thirty-eight million, three hundred fifteen thousand, seven hundred sixty-one".