25390134613 has 2 divisors, whose sum is σ = 25390134614. Its totient is φ = 25390134612.

The previous prime is 25390134547. The next prime is 25390134619. The reversal of 25390134613 is 31643109352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25388279569 + 1855044 = 159337^2 + 1362^2 .

It is a cyclic number.

It is not a de Polignac number, because 25390134613 - 2⁹ = 25390134101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25390134619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12695067306 + 12695067307.

It is an arithmetic number, because the mean of its divisors is an integer number (12695067307).

Almost surely, 2^25390134613 is an apocalyptic number.

It is an amenable number.

25390134613 is a deficient number, since it is larger than the sum of its proper divisors (1).

25390134613 is an equidigital number, since it uses as much as digits as its factorization.

25390134613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 58320, while the sum is 37.

The spelling of 25390134613 in words is "twenty-five billion, three hundred ninety million, one hundred thirty-four thousand, six hundred thirteen".