25644455313 has 16 divisors (see below), whose sum is σ = 34244414400. Its totient is φ = 17070425280.

The previous prime is 25644455311. The next prime is 25644455351. The reversal of 25644455313 is 31355444652.

It is not a de Polignac number, because 25644455313 - 2¹ = 25644455311 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25644455311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8814103 + ... + 8817011.

It is an arithmetic number, because the mean of its divisors is an integer number (2140275900).

Almost surely, 2^25644455313 is an apocalyptic number.

It is an amenable number.

25644455313 is a deficient number, since it is larger than the sum of its proper divisors (8599959087).

25644455313 is a wasteful number, since it uses less digits than its factorization.

25644455313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6352.

The product of its digits is 864000, while the sum is 42.

Adding to 25644455313 its reverse (31355444652), we get a palindrome (56999899965).

The spelling of 25644455313 in words is "twenty-five billion, six hundred forty-four million, four hundred fifty-five thousand, three hundred thirteen".