25355165911 has 4 divisors (see below), whose sum is σ = 25616559472. Its totient is φ = 25093772352.

The previous prime is 25355165879. The next prime is 25355165917. The reversal of 25355165911 is 11956155352.

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 25355165911 - 2⁵ = 25355165879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25355165917) 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, 130696635 + ... + 130696828.

It is an arithmetic number, because the mean of its divisors is an integer number (6404139868).

Almost surely, 2^25355165911 is an apocalyptic number.

25355165911 is a deficient number, since it is larger than the sum of its proper divisors (261393561).

25355165911 is an equidigital number, since it uses as much as digits as its factorization.

25355165911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261393560.

The product of its digits is 202500, while the sum is 43.

The spelling of 25355165911 in words is "twenty-five billion, three hundred fifty-five million, one hundred sixty-five thousand, nine hundred eleven".