199747777930 has 32 divisors (see below), whose sum is σ = 380804483520. Its totient is φ = 75177688320.

The previous prime is 199747777927. The next prime is 199747777937. The reversal of 199747777930 is 39777747991.

It is a self number, because there is not a number n which added to its sum of digits gives 199747777930.

It is not an unprimeable number, because it can be changed into a prime (199747777937) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 435625 + ... + 767635.

It is an arithmetic number, because the mean of its divisors is an integer number (11900140110).

Almost surely, 2^199747777930 is an apocalyptic number.

199747777930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

199747777930 is a deficient number, since it is larger than the sum of its proper divisors (181056705590).

199747777930 is a wasteful number, since it uses less digits than its factorization.

199747777930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335574.

The product of its (nonzero) digits is 147027636, while the sum is 70.

The spelling of 199747777930 in words is "one hundred ninety-nine billion, seven hundred forty-seven million, seven hundred seventy-seven thousand, nine hundred thirty".