199122686616 has 128 divisors (see below), whose sum is σ = 574697410560. Its totient is φ = 56315510400.

The previous prime is 199122686603. The next prime is 199122686681. The reversal of 199122686616 is 616686221991.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27158071 + ... + 27165401.

It is an arithmetic number, because the mean of its divisors is an integer number (4489823520).

Almost surely, 2^199122686616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 199122686616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (287348705280).

199122686616 is an abundant number, since it is smaller than the sum of its proper divisors (375574723944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

199122686616 is a wasteful number, since it uses less digits than its factorization.

199122686616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8965 (or 8961 counting only the distinct ones).

The product of its digits is 3359232, while the sum is 57.

The spelling of 199122686616 in words is "one hundred ninety-nine billion, one hundred twenty-two million, six hundred eighty-six thousand, six hundred sixteen".