136661025737 has 2 divisors, whose sum is σ = 136661025738. Its totient is φ = 136661025736.

The previous prime is 136661025713. The next prime is 136661025749. The reversal of 136661025737 is 737520166631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 126464873161 + 10196152576 = 355619^2 + 100976^2 .

It is a cyclic number.

It is not a de Polignac number, because 136661025737 - 2¹⁰ = 136661024713 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 136661025691 and 136661025700.

It is not a weakly prime, because it can be changed into another prime (136661025337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68330512868 + 68330512869.

It is an arithmetic number, because the mean of its divisors is an integer number (68330512869).

Almost surely, 2^136661025737 is an apocalyptic number.

It is an amenable number.

136661025737 is a deficient number, since it is larger than the sum of its proper divisors (1).

136661025737 is an equidigital number, since it uses as much as digits as its factorization.

136661025737 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 952560, while the sum is 47.

The spelling of 136661025737 in words is "one hundred thirty-six billion, six hundred sixty-one million, twenty-five thousand, seven hundred thirty-seven".