136740518669 has 2 divisors, whose sum is σ = 136740518670. Its totient is φ = 136740518668.

The previous prime is 136740518591. The next prime is 136740518683. The reversal of 136740518669 is 966815047631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91621236100 + 45119282569 = 302690^2 + 212413^2 .

It is a cyclic number.

It is not a de Polignac number, because 136740518669 - 2¹⁶ = 136740453133 is a prime.

It is a super-2 number, since 2×136740518669² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136740515669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68370259334 + 68370259335.

It is an arithmetic number, because the mean of its divisors is an integer number (68370259335).

Almost surely, 2^136740518669 is an apocalyptic number.

It is an amenable number.

136740518669 is a deficient number, since it is larger than the sum of its proper divisors (1).

136740518669 is an equidigital number, since it uses as much as digits as its factorization.

136740518669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6531840, while the sum is 56.

The spelling of 136740518669 in words is "one hundred thirty-six billion, seven hundred forty million, five hundred eighteen thousand, six hundred sixty-nine".