199438028563 has 16 divisors (see below), whose sum is σ = 217164900960. Its totient is φ = 182443495936.

The previous prime is 199438028551. The next prime is 199438028609. The reversal of 199438028563 is 365820834991.

It is a de Polignac number, because none of the positive numbers 2^k-199438028563 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 199438028498 and 199438028507.

It is not an unprimeable number, because it can be changed into a prime (199438028533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 937948 + ... + 1130761.

It is an arithmetic number, because the mean of its divisors is an integer number (13572806310).

Almost surely, 2^199438028563 is an apocalyptic number.

199438028563 is a deficient number, since it is larger than the sum of its proper divisors (17726872397).

199438028563 is a wasteful number, since it uses less digits than its factorization.

199438028563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2068886.

The product of its (nonzero) digits is 11197440, while the sum is 58.

The spelling of 199438028563 in words is "one hundred ninety-nine billion, four hundred thirty-eight million, twenty-eight thousand, five hundred sixty-three".