196091909190691 has 16 divisors (see below), whose sum is σ = 202114745078400. Its totient is φ = 190146417643008.

The previous prime is 196091909190643. The next prime is 196091909190703.

196091909190691 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 196091909190691 - 2⁴¹ = 193892885935139 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 196091909190691.

It is not an unprimeable number, because it can be changed into a prime (196091909191691) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76574055 + ... + 79093423.

It is an arithmetic number, because the mean of its divisors is an integer number (12632171567400).

Almost surely, 2^{196091909190691} is an apocalyptic number.

196091909190691 is a deficient number, since it is larger than the sum of its proper divisors (6022835887709).

196091909190691 is a wasteful number, since it uses less digits than its factorization.

196091909190691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2534718.

The product of its (nonzero) digits is 19131876, while the sum is 70.

The spelling of 196091909190691 in words is "one hundred ninety-six trillion, ninety-one billion, nine hundred nine million, one hundred ninety thousand, six hundred ninety-one".