190409904091 has 6 divisors (see below), whose sum is σ = 209293531076. Its totient is φ = 173099912700.

The previous prime is 190409904073. The next prime is 190409904131.

190409904091 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 190409904091 - 2⁷ = 190409903963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (190409902091) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 786817665 + ... + 786817906.

Almost surely, 2^190409904091 is an apocalyptic number.

190409904091 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

190409904091 is a deficient number, since it is larger than the sum of its proper divisors (18883626985).

190409904091 is a wasteful number, since it uses less digits than its factorization.

190409904091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1573635593 (or 1573635582 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 46.

The spelling of 190409904091 in words is "one hundred ninety billion, four hundred nine million, nine hundred four thousand, ninety-one".