199561612322 has 6 divisors (see below), whose sum is σ = 299343366129. Its totient is φ = 99780490280.

The previous prime is 199561612319. The next prime is 199561612333. The reversal of 199561612322 is 223216165991.

It can be written as a sum of positive squares in 2 ways, for example, as 184942142401 + 14619469921 = 430049^2 + 120911^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=315881.

It is a super-2 number, since 2×199561612322² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 473822 + ... + 789702.

Almost surely, 2^199561612322 is an apocalyptic number.

199561612322 is a deficient number, since it is larger than the sum of its proper divisors (99781753807).

199561612322 is an frugal number, since it uses more digits than its factorization.

199561612322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631764 (or 315883 counting only the distinct ones).

The product of its digits is 349920, while the sum is 47.

The spelling of 199561612322 in words is "one hundred ninety-nine billion, five hundred sixty-one million, six hundred twelve thousand, three hundred twenty-two".