191099282680 has 16 divisors (see below), whose sum is σ = 429973386120. Its totient is φ = 76439713056.

The previous prime is 191099282657. The next prime is 191099282707. The reversal of 191099282680 is 86282990191.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2388740994 + ... + 2388741073.

Almost surely, 2^191099282680 is an apocalyptic number.

191099282680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

191099282680 is an abundant number, since it is smaller than the sum of its proper divisors (238874103440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

191099282680 is a wasteful number, since it uses less digits than its factorization.

191099282680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4777482078 (or 4777482074 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 55.

The spelling of 191099282680 in words is "one hundred ninety-one billion, ninety-nine million, two hundred eighty-two thousand, six hundred eighty".