199299661440 has 192 divisors, whose sum is σ = 698270237280. Its totient is φ = 48315013120.

The previous prime is 199299661427. The next prime is 199299661441. The reversal of 199299661440 is 44166992991.

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (60).

It is not an unprimeable number, because it can be changed into a prime (199299661441) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 196614 + ... + 661253.

Almost surely, 2^199299661440 is an apocalyptic number.

199299661440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

199299661440 is an abundant number, since it is smaller than the sum of its proper divisors (498970575840).

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

199299661440 is a wasteful number, since it uses less digits than its factorization.

199299661440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 857911 (or 857888 counting only the distinct ones).

The product of its (nonzero) digits is 7558272, while the sum is 60.

The spelling of 199299661440 in words is "one hundred ninety-nine billion, two hundred ninety-nine million, six hundred sixty-one thousand, four hundred forty".