136681739699 has 2 divisors, whose sum is σ = 136681739700. Its totient is φ = 136681739698.

The previous prime is 136681739681. The next prime is 136681739713. The reversal of 136681739699 is 996937186631.

It is a strong prime.

It is an emirp because it is prime and its reverse (996937186631) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136681739699 is a prime.

It is a super-2 number, since 2×136681739699² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (136681739629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68340869849 + 68340869850.

It is an arithmetic number, because the mean of its divisors is an integer number (68340869850).

Almost surely, 2^136681739699 is an apocalyptic number.

136681739699 is a deficient number, since it is larger than the sum of its proper divisors (1).

136681739699 is an equidigital number, since it uses as much as digits as its factorization.

136681739699 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 79361856, while the sum is 68.

The spelling of 136681739699 in words is "one hundred thirty-six billion, six hundred eighty-one million, seven hundred thirty-nine thousand, six hundred ninety-nine".