197799728397199 has 8 divisors (see below), whose sum is σ = 200758091280768. Its totient is φ = 194841545752920.

The previous prime is 197799728397169. The next prime is 197799728397239. The reversal of 197799728397199 is 991793827997791.

It is a happy number.

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 197799728397199 - 2¹¹ = 197799728395151 is a prime.

It is a super-2 number, since 2×197799728397199² (a number of 29 digits) contains 22 as substring.

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 197799728397199.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197799728397149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42847747 + ... + 47239060.

It is an arithmetic number, because the mean of its divisors is an integer number (25094761410096).

Almost surely, 2^{197799728397199} is an apocalyptic number.

197799728397199 is a deficient number, since it is larger than the sum of its proper divisors (2958362883569).

197799728397199 is an equidigital number, since it uses as much as digits as its factorization.

197799728397199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90119645.

The product of its digits is 61247512368, while the sum is 97.

The spelling of 197799728397199 in words is "one hundred ninety-seven trillion, seven hundred ninety-nine billion, seven hundred twenty-eight million, three hundred ninety-seven thousand, one hundred ninety-nine".