199427217613894 has 4 divisors (see below), whose sum is σ = 299140826420844. Its totient is φ = 99713608806946.

The previous prime is 199427217613849. The next prime is 199427217614011. The reversal of 199427217613894 is 498316712724991.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49856804403472 + ... + 49856804403475.

It is an arithmetic number, because the mean of its divisors is an integer number (74785206605211).

Almost surely, 2^{199427217613894} is an apocalyptic number.

199427217613894 is a deficient number, since it is larger than the sum of its proper divisors (99713608806950).

199427217613894 is an equidigital number, since it uses as much as digits as its factorization.

199427217613894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99713608806949.

The product of its digits is 329204736, while the sum is 73.

The spelling of 199427217613894 in words is "one hundred ninety-nine trillion, four hundred twenty-seven billion, two hundred seventeen million, six hundred thirteen thousand, eight hundred ninety-four".