199089800051279 has 4 divisors (see below), whose sum is σ = 199089849336576. Its totient is φ = 199089750765984.

The previous prime is 199089800051183. The next prime is 199089800051297. The reversal of 199089800051279 is 972150008980991.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 199089800051279 - 2⁴⁰ = 197990288423503 is a prime.

It is a super-2 number, since 2×199089800051279² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199089800054279) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17983514 + ... + 26862359.

It is an arithmetic number, because the mean of its divisors is an integer number (49772462334144).

Almost surely, 2^{199089800051279} is an apocalyptic number.

199089800051279 is a deficient number, since it is larger than the sum of its proper divisors (49285297).

199089800051279 is an equidigital number, since it uses as much as digits as its factorization.

199089800051279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49285296.

The product of its (nonzero) digits is 29393280, while the sum is 68.

The spelling of 199089800051279 in words is "one hundred ninety-nine trillion, eighty-nine billion, eight hundred million, fifty-one thousand, two hundred seventy-nine".