13694405861 has 2 divisors, whose sum is σ = 13694405862. Its totient is φ = 13694405860.

The previous prime is 13694405843. The next prime is 13694405867. The reversal of 13694405861 is 16850449631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11632701025 + 2061704836 = 107855^2 + 45406^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13694405861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13694405867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6847202930 + 6847202931.

It is an arithmetic number, because the mean of its divisors is an integer number (6847202931).

Almost surely, 2^13694405861 is an apocalyptic number.

It is an amenable number.

13694405861 is a deficient number, since it is larger than the sum of its proper divisors (1).

13694405861 is an equidigital number, since it uses as much as digits as its factorization.

13694405861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 622080, while the sum is 47.

The spelling of 13694405861 in words is "thirteen billion, six hundred ninety-four million, four hundred five thousand, eight hundred sixty-one".