199955003138 has 16 divisors (see below), whose sum is σ = 336042316224. Its totient is φ = 88432187760.

The previous prime is 199955003137. The next prime is 199955003141. The reversal of 199955003138 is 831300559991.

It is a self number, because there is not a number n which added to its sum of digits gives 199955003138.

It is not an unprimeable number, because it can be changed into a prime (199955003137) 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, 122821670 + ... + 122823297.

It is an arithmetic number, because the mean of its divisors is an integer number (21002644764).

Almost surely, 2^199955003138 is an apocalyptic number.

199955003138 is a deficient number, since it is larger than the sum of its proper divisors (136087313086).

199955003138 is a wasteful number, since it uses less digits than its factorization.

199955003138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245645017.

The product of its (nonzero) digits is 1312200, while the sum is 53.

The spelling of 199955003138 in words is "one hundred ninety-nine billion, nine hundred fifty-five million, three thousand, one hundred thirty-eight".