25718361121 has 4 divisors (see below), whose sum is σ = 25746347200. Its totient is φ = 25690375044.

The previous prime is 25718361089. The next prime is 25718361127. The reversal of 25718361121 is 12116381752.

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 25718361121 - 2⁵ = 25718361089 is a prime.

It is a super-2 number, since 2×25718361121² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25718361127) 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 3 ways as a sum of consecutive naturals, for example, 13991661 + ... + 13993498.

It is an arithmetic number, because the mean of its divisors is an integer number (6436586800).

Almost surely, 2^25718361121 is an apocalyptic number.

It is an amenable number.

25718361121 is a deficient number, since it is larger than the sum of its proper divisors (27986079).

25718361121 is an equidigital number, since it uses as much as digits as its factorization.

25718361121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27986078.

The product of its digits is 20160, while the sum is 37.

The spelling of 25718361121 in words is "twenty-five billion, seven hundred eighteen million, three hundred sixty-one thousand, one hundred twenty-one".