136637397593 has 2 divisors, whose sum is σ = 136637397594. Its totient is φ = 136637397592.

The previous prime is 136637397587. The next prime is 136637397641. The reversal of 136637397593 is 395793736631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128972920384 + 7664477209 = 359128^2 + 87547^2 .

It is an emirp because it is prime and its reverse (395793736631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 136637397593 - 2⁶ = 136637397529 is a prime.

It is not a weakly prime, because it can be changed into another prime (136637397893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68318698796 + 68318698797.

It is an arithmetic number, because the mean of its divisors is an integer number (68318698797).

Almost surely, 2^136637397593 is an apocalyptic number.

It is an amenable number.

136637397593 is a deficient number, since it is larger than the sum of its proper divisors (1).

136637397593 is an equidigital number, since it uses as much as digits as its factorization.

136637397593 is an evil number, because the sum of its binary digits is even.

The product of its digits is 57868020, while the sum is 62.

The spelling of 136637397593 in words is "one hundred thirty-six billion, six hundred thirty-seven million, three hundred ninety-seven thousand, five hundred ninety-three".