136506434761 has 2 divisors, whose sum is σ = 136506434762. Its totient is φ = 136506434760.

The previous prime is 136506434741. The next prime is 136506434797. The reversal of 136506434761 is 167434605631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 112308765625 + 24197669136 = 335125^2 + 155556^2 .

It is an emirp because it is prime and its reverse (167434605631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 136506434761 - 2²⁵ = 136472880329 is a prime.

It is not a weakly prime, because it can be changed into another prime (136506434741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68253217380 + 68253217381.

It is an arithmetic number, because the mean of its divisors is an integer number (68253217381).

Almost surely, 2^136506434761 is an apocalyptic number.

It is an amenable number.

136506434761 is a deficient number, since it is larger than the sum of its proper divisors (1).

136506434761 is an equidigital number, since it uses as much as digits as its factorization.

136506434761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1088640, while the sum is 46.

The spelling of 136506434761 in words is "one hundred thirty-six billion, five hundred six million, four hundred thirty-four thousand, seven hundred sixty-one".