198021641819616 has 96 divisors (see below), whose sum is σ = 577617692349600. Its totient is φ = 66000977326080.

The previous prime is 198021641819611. The next prime is 198021641819621. The reversal of 198021641819616 is 616918146120891.

198021641819616 is a `hidden beast` number, since 1 + 9 + 8 + 0 + 2 + 1 + 6 + 4 + 1 + 8 + 1 + 9 + 616 = 666.

It is an interprime number because it is at equal distance from previous prime (198021641819611) and next prime (198021641819621).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198021641819611) 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, 1673265 + ... + 19971056.

It is an arithmetic number, because the mean of its divisors is an integer number (6016850961975).

Almost surely, 2^{198021641819616} is an apocalyptic number.

198021641819616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

198021641819616 is an abundant number, since it is smaller than the sum of its proper divisors (379596050529984).

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

198021641819616 is a wasteful number, since it uses less digits than its factorization.

198021641819616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21654929 (or 21654915 counting only the distinct ones).

The product of its (nonzero) digits is 8957952, while the sum is 63.

The spelling of 198021641819616 in words is "one hundred ninety-eight trillion, twenty-one billion, six hundred forty-one million, eight hundred nineteen thousand, six hundred sixteen".