136994668537 has 2 divisors, whose sum is σ = 136994668538. Its totient is φ = 136994668536.

The previous prime is 136994668519. The next prime is 136994668553. The reversal of 136994668537 is 735866499631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100613302416 + 36381366121 = 317196^2 + 190739^2 .

It is a cyclic number.

It is not a de Polignac number, because 136994668537 - 2⁷ = 136994668409 is a prime.

It is not a weakly prime, because it can be changed into another prime (136994668637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68497334268 + 68497334269.

It is an arithmetic number, because the mean of its divisors is an integer number (68497334269).

Almost surely, 2^136994668537 is an apocalyptic number.

It is an amenable number.

136994668537 is a deficient number, since it is larger than the sum of its proper divisors (1).

136994668537 is an equidigital number, since it uses as much as digits as its factorization.

136994668537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 176359680, while the sum is 67.

The spelling of 136994668537 in words is "one hundred thirty-six billion, nine hundred ninety-four million, six hundred sixty-eight thousand, five hundred thirty-seven".