191561106 has 32 divisors (see below), whose sum is σ = 424812096. Its totient is φ = 57096000.

The previous prime is 191561077. The next prime is 191561113. The reversal of 191561106 is 601165191.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19765 + ... + 27816.

It is an arithmetic number, because the mean of its divisors is an integer number (13275378).

Almost surely, 2^191561106 is an apocalyptic number.

191561106 is an abundant number, since it is smaller than the sum of its proper divisors (233250990).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

191561106 is a wasteful number, since it uses less digits than its factorization.

191561106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47658.

The product of its (nonzero) digits is 1620, while the sum is 30.

The square root of 191561106 is about 13840.5601765246. The cubic root of 191561106 is about 576.4599131101.

The spelling of 191561106 in words is "one hundred ninety-one million, five hundred sixty-one thousand, one hundred six".