136501351491 has 16 divisors (see below), whose sum is σ = 182437635744. Its totient is φ = 90783181824.

The previous prime is 136501351447. The next prime is 136501351507. The reversal of 136501351491 is 194153105631.

It is not a de Polignac number, because 136501351491 - 2²³ = 136492962883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (136501351421) 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, 2872275 + ... + 2919411.

It is an arithmetic number, because the mean of its divisors is an integer number (11402352234).

Almost surely, 2^136501351491 is an apocalyptic number.

136501351491 is a deficient number, since it is larger than the sum of its proper divisors (45936284253).

136501351491 is a wasteful number, since it uses less digits than its factorization.

136501351491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49430.

The product of its (nonzero) digits is 48600, while the sum is 39.

The spelling of 136501351491 in words is "one hundred thirty-six billion, five hundred one million, three hundred fifty-one thousand, four hundred ninety-one".