190891474922 has 4 divisors (see below), whose sum is σ = 286337212386. Its totient is φ = 95445737460.

The previous prime is 190891474859. The next prime is 190891474931. The reversal of 190891474922 is 229474198091.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 153592664281 + 37298810641 = 391909^2 + 193129^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 47722868729 + ... + 47722868732.

Almost surely, 2^190891474922 is an apocalyptic number.

190891474922 is a deficient number, since it is larger than the sum of its proper divisors (95445737464).

190891474922 is an equidigital number, since it uses as much as digits as its factorization.

190891474922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95445737463.

The product of its (nonzero) digits is 2612736, while the sum is 56.

The spelling of 190891474922 in words is "one hundred ninety billion, eight hundred ninety-one million, four hundred seventy-four thousand, nine hundred twenty-two".