25165449313 has 4 divisors (see below), whose sum is σ = 25270744320. Its totient is φ = 25060154308.

The previous prime is 25165449259. The next prime is 25165449319. The reversal of 25165449313 is 31394456152.

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 25165449313 - 2³³ = 16575514721 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25165449313.

It is not an unprimeable number, because it can be changed into a prime (25165449319) 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, 52647145 + ... + 52647622.

It is an arithmetic number, because the mean of its divisors is an integer number (6317686080).

Almost surely, 2^25165449313 is an apocalyptic number.

It is an amenable number.

25165449313 is a deficient number, since it is larger than the sum of its proper divisors (105295007).

25165449313 is a wasteful number, since it uses less digits than its factorization.

25165449313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105295006.

The product of its digits is 388800, while the sum is 43.

The spelling of 25165449313 in words is "twenty-five billion, one hundred sixty-five million, four hundred forty-nine thousand, three hundred thirteen".