199993800001911 has 16 divisors (see below), whose sum is σ = 283682312368128. Its totient is φ = 124891584048000.

The previous prime is 199993800001907. The next prime is 199993800001951. The reversal of 199993800001911 is 119100008399991.

It is not a de Polignac number, because 199993800001911 - 2² = 199993800001907 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199993800001951) 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, 9292517815 + ... + 9292539336.

It is an arithmetic number, because the mean of its divisors is an integer number (17730144523008).

Almost surely, 2^{199993800001911} is an apocalyptic number.

199993800001911 is a deficient number, since it is larger than the sum of its proper divisors (83688512366217).

199993800001911 is a wasteful number, since it uses less digits than its factorization.

199993800001911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18585057382.

The product of its (nonzero) digits is 1417176, while the sum is 60.

The spelling of 199993800001911 in words is "one hundred ninety-nine trillion, nine hundred ninety-three billion, eight hundred million, one thousand, nine hundred eleven".