198739852643 has 8 divisors (see below), whose sum is σ = 205623139680. Its totient is φ = 191858578240.

The previous prime is 198739852621. The next prime is 198739852667. The reversal of 198739852643 is 346258937891.

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 198739852643 - 2³⁶ = 130020375907 is a prime.

It is a super-2 number, since 2×198739852643² (a number of 23 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 198739852643.

It is not an unprimeable number, because it can be changed into a prime (198739852603) 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, 300863 + ... + 698568.

It is an arithmetic number, because the mean of its divisors is an integer number (25702892460).

Almost surely, 2^198739852643 is an apocalyptic number.

198739852643 is a deficient number, since it is larger than the sum of its proper divisors (6883287037).

198739852643 is an equidigital number, since it uses as much as digits as its factorization.

198739852643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1006317.

The product of its digits is 78382080, while the sum is 65.

The spelling of 198739852643 in words is "one hundred ninety-eight billion, seven hundred thirty-nine million, eight hundred fifty-two thousand, six hundred forty-three".