199888492656 has 80 divisors (see below), whose sum is σ = 517614683040. Its totient is φ = 66470200320.

The previous prime is 199888492651. The next prime is 199888492703. The reversal of 199888492656 is 656294888991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199888492651) 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, 52311226 + ... + 52315046.

It is an arithmetic number, because the mean of its divisors is an integer number (6470183538).

Almost surely, 2^199888492656 is an apocalyptic number.

199888492656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

199888492656 is an abundant number, since it is smaller than the sum of its proper divisors (317726190384).

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

199888492656 is a wasteful number, since it uses less digits than its factorization.

199888492656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6154 (or 6148 counting only the distinct ones).

The product of its digits is 537477120, while the sum is 75.

The spelling of 199888492656 in words is "one hundred ninety-nine billion, eight hundred eighty-eight million, four hundred ninety-two thousand, six hundred fifty-six".