199539765845632 has 16 divisors (see below), whose sum is σ = 397520627270850. Its totient is φ = 99769882922752.

The previous prime is 199539765845621. The next prime is 199539765845657. The reversal of 199539765845632 is 236548567935991.

It can be written as a sum of positive squares in only one way, i.e., 182296875013696 + 17242890831936 = 13501736^2 + 4152456^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a super-2 number, since 2×199539765845632² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 779452210207 + ... + 779452210462.

Almost surely, 2^{199539765845632} is an apocalyptic number.

It is an amenable number.

199539765845632 is a deficient number, since it is larger than the sum of its proper divisors (197980861425218).

199539765845632 is an equidigital number, since it uses as much as digits as its factorization.

199539765845632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1558904420683 (or 1558904420671 counting only the distinct ones).

The product of its digits is 13226976000, while the sum is 82.

The spelling of 199539765845632 in words is "one hundred ninety-nine trillion, five hundred thirty-nine billion, seven hundred sixty-five million, eight hundred forty-five thousand, six hundred thirty-two".