136731468787509 has 64 divisors (see below), whose sum is σ = 185186741096448. Its totient is φ = 89729761651200.

The previous prime is 136731468787499. The next prime is 136731468787513. The reversal of 136731468787509 is 905787864137631.

It is not a de Polignac number, because 136731468787509 - 2⁵ = 136731468787477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136731468787559) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 74675842224 + ... + 74675844054.

It is an arithmetic number, because the mean of its divisors is an integer number (2893542829632).

Almost surely, 2^{136731468787509} is an apocalyptic number.

It is an amenable number.

136731468787509 is a deficient number, since it is larger than the sum of its proper divisors (48455272308939).

136731468787509 is a wasteful number, since it uses less digits than its factorization.

136731468787509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4498.

The product of its (nonzero) digits is 1280240640, while the sum is 75.

The spelling of 136731468787509 in words is "one hundred thirty-six trillion, seven hundred thirty-one billion, four hundred sixty-eight million, seven hundred eighty-seven thousand, five hundred nine".