136645303005581 has 2 divisors, whose sum is σ = 136645303005582. Its totient is φ = 136645303005580.

The previous prime is 136645303005503. The next prime is 136645303005587. The reversal of 136645303005581 is 185500303546631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70089630522025 + 66555672483556 = 8371955^2 + 8158166^2 .

It is a cyclic number.

It is not a de Polignac number, because 136645303005581 - 2³⁴ = 136628123136397 is a prime.

It is a super-2 number, since 2×136645303005581² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136645303005587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68322651502790 + 68322651502791.

It is an arithmetic number, because the mean of its divisors is an integer number (68322651502791).

Almost surely, 2^{136645303005581} is an apocalyptic number.

It is an amenable number.

136645303005581 is a deficient number, since it is larger than the sum of its proper divisors (1).

136645303005581 is an equidigital number, since it uses as much as digits as its factorization.

136645303005581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888000, while the sum is 50.

The spelling of 136645303005581 in words is "one hundred thirty-six trillion, six hundred forty-five billion, three hundred three million, five thousand, five hundred eighty-one".