191801920382290 has 32 divisors (see below), whose sum is σ = 349406248726080. Its totient is φ = 75795720358464.

The previous prime is 191801920382287. The next prime is 191801920382309. The reversal of 191801920382290 is 92283029108191.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93771721 + ... + 95795299.

It is an arithmetic number, because the mean of its divisors is an integer number (10918945272690).

Almost surely, 2^{191801920382290} is an apocalyptic number.

191801920382290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

191801920382290 is a deficient number, since it is larger than the sum of its proper divisors (157604328343790).

191801920382290 is a wasteful number, since it uses less digits than its factorization.

191801920382290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2137866.

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

The spelling of 191801920382290 in words is "one hundred ninety-one trillion, eight hundred one billion, nine hundred twenty million, three hundred eighty-two thousand, two hundred ninety".