191091092001 has 16 divisors (see below), whose sum is σ = 258396750720. Its totient is φ = 125590026240.

The previous prime is 191091091957. The next prime is 191091092021. The reversal of 191091092001 is 100290190191.

It is not a de Polignac number, because 191091092001 - 2¹⁵ = 191091059233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (191091092021) 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, 3605985 + ... + 3658593.

It is an arithmetic number, because the mean of its divisors is an integer number (16149796920).

Almost surely, 2^191091092001 is an apocalyptic number.

It is an amenable number.

191091092001 is a deficient number, since it is larger than the sum of its proper divisors (67305658719).

191091092001 is a wasteful number, since it uses less digits than its factorization.

191091092001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69736.

The product of its (nonzero) digits is 1458, while the sum is 33.

The spelling of 191091092001 in words is "one hundred ninety-one billion, ninety-one million, ninety-two thousand, one".