136709531639 has 2 divisors, whose sum is σ = 136709531640. Its totient is φ = 136709531638.

The previous prime is 136709531587. The next prime is 136709531681. The reversal of 136709531639 is 936135907631.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 136709531639 - 2⁸ = 136709531383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136709531039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68354765819 + 68354765820.

It is an arithmetic number, because the mean of its divisors is an integer number (68354765820).

Almost surely, 2^136709531639 is an apocalyptic number.

136709531639 is a deficient number, since it is larger than the sum of its proper divisors (1).

136709531639 is an equidigital number, since it uses as much as digits as its factorization.

136709531639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2755620, while the sum is 53.

The spelling of 136709531639 in words is "one hundred thirty-six billion, seven hundred nine million, five hundred thirty-one thousand, six hundred thirty-nine".