199322610491 has 4 divisors (see below), whose sum is σ = 201086527512. Its totient is φ = 197558693472.

The previous prime is 199322610469. The next prime is 199322610517. The reversal of 199322610491 is 194016223991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 194016223991 = 146581 ⋅1323611.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199322610491 is a prime.

It is a super-2 number, since 2×199322610491² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199322615491) 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, 881958341 + ... + 881958566.

It is an arithmetic number, because the mean of its divisors is an integer number (50271631878).

Almost surely, 2^199322610491 is an apocalyptic number.

199322610491 is a deficient number, since it is larger than the sum of its proper divisors (1763917021).

199322610491 is a wasteful number, since it uses less digits than its factorization.

199322610491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1763917020.

The product of its (nonzero) digits is 209952, while the sum is 47.

The spelling of 199322610491 in words is "one hundred ninety-nine billion, three hundred twenty-two million, six hundred ten thousand, four hundred ninety-one".