136988999191 has 16 divisors (see below), whose sum is σ = 158288528160. Its totient is φ = 117168916480.

The previous prime is 136988999183. The next prime is 136988999201. The reversal of 136988999191 is 191999889631.

It is not a de Polignac number, because 136988999191 - 2³ = 136988999183 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 (136988999891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 415305 + ... + 668173.

It is an arithmetic number, because the mean of its divisors is an integer number (9893033010).

Almost surely, 2^136988999191 is an apocalyptic number.

136988999191 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

136988999191 is a deficient number, since it is larger than the sum of its proper divisors (21299528969).

136988999191 is a wasteful number, since it uses less digits than its factorization.

136988999191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255794.

The product of its digits is 68024448, while the sum is 73.

The spelling of 136988999191 in words is "one hundred thirty-six billion, nine hundred eighty-eight million, nine hundred ninety-nine thousand, one hundred ninety-one".