25105501161613 has 2 divisors, whose sum is σ = 25105501161614. Its totient is φ = 25105501161612.

The previous prime is 25105501161599. The next prime is 25105501161703. The reversal of 25105501161613 is 31616110550152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24792811060644 + 312690100969 = 4979238^2 + 559187^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25105501161613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25105501167613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12552750580806 + 12552750580807.

It is an arithmetic number, because the mean of its divisors is an integer number (12552750580807).

Almost surely, 2^{25105501161613} is an apocalyptic number.

It is an amenable number.

25105501161613 is a deficient number, since it is larger than the sum of its proper divisors (1).

25105501161613 is an equidigital number, since it uses as much as digits as its factorization.

25105501161613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27000, while the sum is 37.

The spelling of 25105501161613 in words is "twenty-five trillion, one hundred five billion, five hundred one million, one hundred sixty-one thousand, six hundred thirteen".