199644273245856 has 96 divisors (see below), whose sum is σ = 555020552495808. Its totient is φ = 62619172474880.

The previous prime is 199644273245827. The next prime is 199644273245869. The reversal of 199644273245856 is 658542372446991.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6850350 + ... + 21123821.

It is an arithmetic number, because the mean of its divisors is an integer number (5781464088498).

Almost surely, 2^{199644273245856} is an apocalyptic number.

199644273245856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

199644273245856 is an abundant number, since it is smaller than the sum of its proper divisors (355376279249952).

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

199644273245856 is a wasteful number, since it uses less digits than its factorization.

199644273245856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27978574 (or 27978566 counting only the distinct ones).

The product of its digits is 3135283200, while the sum is 75.

The spelling of 199644273245856 in words is "one hundred ninety-nine trillion, six hundred forty-four billion, two hundred seventy-three million, two hundred forty-five thousand, eight hundred fifty-six".