136740518639 has 16 divisors (see below), whose sum is σ = 142715443200. Its totient is φ = 130924426464.

The previous prime is 136740518591. The next prime is 136740518669. The reversal of 136740518639 is 936815047631.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136740518639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136740518669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 235784 + ... + 573650.

It is an arithmetic number, because the mean of its divisors is an integer number (8919715200).

Almost surely, 2^136740518639 is an apocalyptic number.

136740518639 is a deficient number, since it is larger than the sum of its proper divisors (5974924561).

136740518639 is a wasteful number, since it uses less digits than its factorization.

136740518639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338102.

The product of its (nonzero) digits is 3265920, while the sum is 53.

The spelling of 136740518639 in words is "one hundred thirty-six billion, seven hundred forty million, five hundred eighteen thousand, six hundred thirty-nine".