25935541613 has 2 divisors, whose sum is σ = 25935541614. Its totient is φ = 25935541612.

The previous prime is 25935541591. The next prime is 25935541637. The reversal of 25935541613 is 31614553952.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13106128324 + 12829413289 = 114482^2 + 113267^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25935541613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25935541673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12967770806 + 12967770807.

It is an arithmetic number, because the mean of its divisors is an integer number (12967770807).

Almost surely, 2^25935541613 is an apocalyptic number.

It is an amenable number.

25935541613 is a deficient number, since it is larger than the sum of its proper divisors (1).

25935541613 is an equidigital number, since it uses as much as digits as its factorization.

25935541613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 486000, while the sum is 44.

The spelling of 25935541613 in words is "twenty-five billion, nine hundred thirty-five million, five hundred forty-one thousand, six hundred thirteen".