199397665982 has 8 divisors (see below), whose sum is σ = 299104493952. Its totient is φ = 99696168000.

The previous prime is 199397665931. The next prime is 199397665991. The reversal of 199397665982 is 289566793991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1237619 + ... + 1389422.

It is an arithmetic number, because the mean of its divisors is an integer number (37388061744).

Almost surely, 2^199397665982 is an apocalyptic number.

199397665982 is a deficient number, since it is larger than the sum of its proper divisors (99706827970).

199397665982 is a wasteful number, since it uses less digits than its factorization.

199397665982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2664994.

The product of its digits is 396809280, while the sum is 74.

The spelling of 199397665982 in words is "one hundred ninety-nine billion, three hundred ninety-seven million, six hundred sixty-five thousand, nine hundred eighty-two".