199291791670 has 8 divisors (see below), whose sum is σ = 358725225024. Its totient is φ = 79716716664.

The previous prime is 199291791667. The next prime is 199291791679. The reversal of 199291791670 is 76197192991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 199291791599 and 199291791608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199291791679) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9964589574 + ... + 9964589593.

It is an arithmetic number, because the mean of its divisors is an integer number (44840653128).

Almost surely, 2^199291791670 is an apocalyptic number.

199291791670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

199291791670 is a deficient number, since it is larger than the sum of its proper divisors (159433433354).

199291791670 is a wasteful number, since it uses less digits than its factorization.

199291791670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19929179174.

The product of its (nonzero) digits is 3857868, while the sum is 61.

The spelling of 199291791670 in words is "one hundred ninety-nine billion, two hundred ninety-one million, seven hundred ninety-one thousand, six hundred seventy".