197899969998791 has 8 divisors (see below), whose sum is σ = 204291832829568. Its totient is φ = 191508606720000.

The previous prime is 197899969998737. The next prime is 197899969998917.

It is a happy number.

197899969998791 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is not a de Polignac number, because 197899969998791 - 2⁴⁶ = 127531225821127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197899969998721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124082810 + ... + 125667591.

It is an arithmetic number, because the mean of its divisors is an integer number (25536479103696).

Almost surely, 2^{197899969998791} is an apocalyptic number.

197899969998791 is a deficient number, since it is larger than the sum of its proper divisors (6391862830777).

197899969998791 is a wasteful number, since it uses less digits than its factorization.

197899969998791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249775993.

The product of its digits is 809967102336, while the sum is 110.

The spelling of 197899969998791 in words is "one hundred ninety-seven trillion, eight hundred ninety-nine billion, nine hundred sixty-nine million, nine hundred ninety-eight thousand, seven hundred ninety-one".