25321263536613 has 32 divisors (see below), whose sum is σ = 39024331517952. Its totient is φ = 14433546848000.

The previous prime is 25321263536509. The next prime is 25321263536623. The reversal of 25321263536613 is 31663536212352.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 25321263536613 - 2²⁶ = 25321196427749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25321263536623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14739381 + ... + 16367402.

It is an arithmetic number, because the mean of its divisors is an integer number (1219510359936).

Almost surely, 2^{25321263536613} is an apocalyptic number.

It is an amenable number.

25321263536613 is a deficient number, since it is larger than the sum of its proper divisors (13703067981339).

25321263536613 is a wasteful number, since it uses less digits than its factorization.

25321263536613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31108265.

The product of its digits is 3499200, while the sum is 48.

Adding to 25321263536613 its reverse (31663536212352), we get a palindrome (56984799748965).

The spelling of 25321263536613 in words is "twenty-five trillion, three hundred twenty-one billion, two hundred sixty-three million, five hundred thirty-six thousand, six hundred thirteen".