199859942098 has 8 divisors (see below), whose sum is σ = 303896624508. Its totient is φ = 98561067264.

The previous prime is 199859942081. The next prime is 199859942101. The reversal of 199859942098 is 890249958991.

It can be written as a sum of positive squares in 2 ways, for example, as 187114209489 + 12745732609 = 432567^2 + 112897^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (73).

It is a self number, because there is not a number n which added to its sum of digits gives 199859942098.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 684451711 + ... + 684452002.

Almost surely, 2^199859942098 is an apocalyptic number.

199859942098 is a deficient number, since it is larger than the sum of its proper divisors (104036682410).

199859942098 is a wasteful number, since it uses less digits than its factorization.

199859942098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1368903788.

The product of its (nonzero) digits is 151165440, while the sum is 73.

The spelling of 199859942098 in words is "one hundred ninety-nine billion, eight hundred fifty-nine million, nine hundred forty-two thousand, ninety-eight".