199217847257 has 8 divisors (see below), whose sum is σ = 234046142400. Its totient is φ = 167175815760.

The previous prime is 199217847253. The next prime is 199217847281. The reversal of 199217847257 is 752748712991.

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 199217847257 - 2² = 199217847253 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 199217847257.

It is not an unprimeable number, because it can be changed into a prime (199217847253) 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, 696565757 + ... + 696566042.

It is an arithmetic number, because the mean of its divisors is an integer number (29255767800).

Almost surely, 2^199217847257 is an apocalyptic number.

It is an amenable number.

199217847257 is a deficient number, since it is larger than the sum of its proper divisors (34828295143).

199217847257 is a wasteful number, since it uses less digits than its factorization.

199217847257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1393131823.

The product of its digits is 17781120, while the sum is 62.

The spelling of 199217847257 in words is "one hundred ninety-nine billion, two hundred seventeen million, eight hundred forty-seven thousand, two hundred fifty-seven".