199661252892 has 12 divisors (see below), whose sum is σ = 465876256776. Its totient is φ = 66553750960.

The previous prime is 199661252891. The next prime is 199661252951. The reversal of 199661252892 is 298252166991.

199661252892 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199661252891) 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, 8319218859 + ... + 8319218882.

It is an arithmetic number, because the mean of its divisors is an integer number (38823021398).

Almost surely, 2^199661252892 is an apocalyptic number.

199661252892 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

199661252892 is an abundant number, since it is smaller than the sum of its proper divisors (266215003884).

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

199661252892 is a wasteful number, since it uses less digits than its factorization.

199661252892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16638437748 (or 16638437746 counting only the distinct ones).

The product of its digits is 8398080, while the sum is 60.

The spelling of 199661252892 in words is "one hundred ninety-nine billion, six hundred sixty-one million, two hundred fifty-two thousand, eight hundred ninety-two".