199969700878 has 8 divisors (see below), whose sum is σ = 300008838672. Its totient is φ = 99966754656.

The previous prime is 199969700869. The next prime is 199969700891. The reversal of 199969700878 is 878007969991.

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

It is a self number, because there is not a number n which added to its sum of digits gives 199969700878.

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, 9034075 + ... + 9056182.

It is an arithmetic number, because the mean of its divisors is an integer number (37501104834).

Almost surely, 2^199969700878 is an apocalyptic number.

199969700878 is a deficient number, since it is larger than the sum of its proper divisors (100039137794).

199969700878 is a wasteful number, since it uses less digits than its factorization.

199969700878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18095786.

The product of its (nonzero) digits is 123451776, while the sum is 73.

The spelling of 199969700878 in words is "one hundred ninety-nine billion, nine hundred sixty-nine million, seven hundred thousand, eight hundred seventy-eight".