199681382563 has 8 divisors (see below), whose sum is σ = 216133072848. Its totient is φ = 183385632864.

The previous prime is 199681382557. The next prime is 199681382597. The reversal of 199681382563 is 365283186991.

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-199681382563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199681382513) 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, 38982481 + ... + 38987602.

It is an arithmetic number, because the mean of its divisors is an integer number (27016634106).

Almost surely, 2^199681382563 is an apocalyptic number.

199681382563 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

199681382563 is a deficient number, since it is larger than the sum of its proper divisors (16451690285).

199681382563 is a wasteful number, since it uses less digits than its factorization.

199681382563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77970293.

The product of its digits is 16796160, while the sum is 61.

The spelling of 199681382563 in words is "one hundred ninety-nine billion, six hundred eighty-one million, three hundred eighty-two thousand, five hundred sixty-three".