199234649860 has 24 divisors (see below), whose sum is σ = 432820102680. Its totient is φ = 76945795584.

The previous prime is 199234649839. The next prime is 199234649869. The reversal of 199234649860 is 68946432991.

It can be written as a sum of positive squares in 4 ways, for example, as 42158766276 + 157075883584 = 205326^2 + 396328^2 .

It is not an unprimeable number, because it can be changed into a prime (199234649869) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 171753429 + ... + 171754588.

It is an arithmetic number, because the mean of its divisors is an integer number (18034170945).

Almost surely, 2^199234649860 is an apocalyptic number.

199234649860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

199234649860 is an abundant number, since it is smaller than the sum of its proper divisors (233585452820).

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

199234649860 is a wasteful number, since it uses less digits than its factorization.

199234649860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343508055 (or 343508053 counting only the distinct ones).

The product of its (nonzero) digits is 20155392, while the sum is 61.

The spelling of 199234649860 in words is "one hundred ninety-nine billion, two hundred thirty-four million, six hundred forty-nine thousand, eight hundred sixty".