199506458084639 has 8 divisors (see below), whose sum is σ = 200220710272272. Its totient is φ = 198792236144320.

The previous prime is 199506458084581. The next prime is 199506458084651. The reversal of 199506458084639 is 936480854605991.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199506458084639 is a prime.

It is a super-3 number, since 3×199506458084639³ (a number of 44 digits) contains 333 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 199506458084639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199506458084039) 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, 5694992 + ... + 20771274.

It is an arithmetic number, because the mean of its divisors is an integer number (25027588784034).

Almost surely, 2^{199506458084639} is an apocalyptic number.

199506458084639 is a deficient number, since it is larger than the sum of its proper divisors (714252187633).

199506458084639 is a wasteful number, since it uses less digits than its factorization.

199506458084639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15123657.

The product of its (nonzero) digits is 2015539200, while the sum is 77.

The spelling of 199506458084639 in words is "one hundred ninety-nine trillion, five hundred six billion, four hundred fifty-eight million, eighty-four thousand, six hundred thirty-nine".