196969594391 has 16 divisors (see below), whose sum is σ = 205776780000. Its totient is φ = 188299230336.

The previous prime is 196969594379. The next prime is 196969594399. The reversal of 196969594391 is 193495969691.

It is a cyclic number.

It is not a de Polignac number, because 196969594391 - 2³⁰ = 195895852567 is a prime.

It is a super-2 number, since 2×196969594391² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196969594399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4590545 + ... + 4633253.

It is an arithmetic number, because the mean of its divisors is an integer number (12861048750).

Almost surely, 2^196969594391 is an apocalyptic number.

196969594391 is a deficient number, since it is larger than the sum of its proper divisors (8807185609).

196969594391 is a wasteful number, since it uses less digits than its factorization.

196969594391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44306.

The product of its digits is 127545840, while the sum is 71.

The spelling of 196969594391 in words is "one hundred ninety-six billion, nine hundred sixty-nine million, five hundred ninety-four thousand, three hundred ninety-one".