136564641439 has 2 divisors, whose sum is σ = 136564641440. Its totient is φ = 136564641438.

The previous prime is 136564641377. The next prime is 136564641469. The reversal of 136564641439 is 934146465631.

It is a strong prime.

It is an emirp because it is prime and its reverse (934146465631) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136564641439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136564641469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68282320719 + 68282320720.

It is an arithmetic number, because the mean of its divisors is an integer number (68282320720).

Almost surely, 2^136564641439 is an apocalyptic number.

136564641439 is a deficient number, since it is larger than the sum of its proper divisors (1).

136564641439 is an equidigital number, since it uses as much as digits as its factorization.

136564641439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5598720, while the sum is 52.

The spelling of 136564641439 in words is "one hundred thirty-six billion, five hundred sixty-four million, six hundred forty-one thousand, four hundred thirty-nine".