199968804156 has 24 divisors (see below), whose sum is σ = 509011501824. Its totient is φ = 60596607280.

The previous prime is 199968804121. The next prime is 199968804169. The reversal of 199968804156 is 651408869991.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 757457460 + ... + 757457723.

It is an arithmetic number, because the mean of its divisors is an integer number (21208812576).

Almost surely, 2^199968804156 is an apocalyptic number.

It is an amenable number.

199968804156 is an abundant number, since it is smaller than the sum of its proper divisors (309042697668).

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

199968804156 is a wasteful number, since it uses less digits than its factorization.

199968804156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1514915201 (or 1514915199 counting only the distinct ones).

The product of its (nonzero) digits is 33592320, while the sum is 66.

The spelling of 199968804156 in words is "one hundred ninety-nine billion, nine hundred sixty-eight million, eight hundred four thousand, one hundred fifty-six".