18198199965672 has 64 divisors (see below), whose sum is σ = 52748405712000. Its totient is φ = 5802324625152.

The previous prime is 18198199965661. The next prime is 18198199965703. The reversal of 18198199965672 is 27656999189181.

It is a super-3 number, since 3×18198199965672³ (a number of 41 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18198199965591 and 18198199965600.

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, 1831536897 + ... + 1831546832.

It is an arithmetic number, because the mean of its divisors is an integer number (824193839250).

Almost surely, 2^{18198199965672} is an apocalyptic number.

18198199965672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18198199965672 is an abundant number, since it is smaller than the sum of its proper divisors (34550205746328).

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

18198199965672 is a wasteful number, since it uses less digits than its factorization.

18198199965672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3663083767 (or 3663083757 counting only the distinct ones).

The product of its digits is 1058158080, while the sum is 81.

The spelling of 18198199965672 in words is "eighteen trillion, one hundred ninety-eight billion, one hundred ninety-nine million, nine hundred sixty-five thousand, six hundred seventy-two".