198712619772856 has 128 divisors (see below), whose sum is σ = 428449632399360. Its totient is φ = 84636957888000.

The previous prime is 198712619772817. The next prime is 198712619772859. The reversal of 198712619772856 is 658277916217891.

198712619772856 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198712619772859) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11532265761 + ... + 11532282991.

It is an arithmetic number, because the mean of its divisors is an integer number (3347262753120).

Almost surely, 2^{198712619772856} is an apocalyptic number.

It is an amenable number.

198712619772856 is an abundant number, since it is smaller than the sum of its proper divisors (229737012626504).

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

198712619772856 is a wasteful number, since it uses less digits than its factorization.

198712619772856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19325 (or 19321 counting only the distinct ones).

The product of its digits is 1280240640, while the sum is 79.

The spelling of 198712619772856 in words is "one hundred ninety-eight trillion, seven hundred twelve billion, six hundred nineteen million, seven hundred seventy-two thousand, eight hundred fifty-six".