191082991011 has 16 divisors (see below), whose sum is σ = 281061809280. Its totient is φ = 114506659520.

The previous prime is 191082991007. The next prime is 191082991019. The reversal of 191082991011 is 110199280191.

It is not a de Polignac number, because 191082991011 - 2² = 191082991007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (191082991019) 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, 32527365 + ... + 32533238.

It is an arithmetic number, because the mean of its divisors is an integer number (17566363080).

Almost surely, 2^191082991011 is an apocalyptic number.

191082991011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

191082991011 is a deficient number, since it is larger than the sum of its proper divisors (89978818269).

191082991011 is a wasteful number, since it uses less digits than its factorization.

191082991011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65060706.

The product of its (nonzero) digits is 11664, while the sum is 42.

The spelling of 191082991011 in words is "one hundred ninety-one billion, eighty-two million, nine hundred ninety-one thousand, eleven".