136987764779 has 16 divisors (see below), whose sum is σ = 145291029312. Its totient is φ = 128889750528.

The previous prime is 136987764773. The next prime is 136987764791. The reversal of 136987764779 is 977467789631.

It is a cyclic number.

It is not a de Polignac number, because 136987764779 - 2⁴ = 136987764763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136987764773) 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, 516899 + ... + 735635.

It is an arithmetic number, because the mean of its divisors is an integer number (9080689332).

Almost surely, 2^136987764779 is an apocalyptic number.

136987764779 is a deficient number, since it is larger than the sum of its proper divisors (8303264533).

136987764779 is a wasteful number, since it uses less digits than its factorization.

136987764779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219206.

The product of its digits is 672126336, while the sum is 74.

The spelling of 136987764779 in words is "one hundred thirty-six billion, nine hundred eighty-seven million, seven hundred sixty-four thousand, seven hundred seventy-nine".