216099019872 has 72 divisors (see below), whose sum is σ = 615859249824. Its totient is φ = 71877383424.

The previous prime is 216099019823. The next prime is 216099019979. The reversal of 216099019872 is 278910990612.

216099019872 is a `hidden beast` number, since 21 + 609 + 9 + 0 + 1 + 9 + 8 + 7 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 676963 + ... + 943650.

It is an arithmetic number, because the mean of its divisors is an integer number (8553600692).

Almost surely, 2^216099019872 is an apocalyptic number.

It is an amenable number.

216099019872 is an abundant number, since it is smaller than the sum of its proper divisors (399760229952).

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

216099019872 is a wasteful number, since it uses less digits than its factorization.

216099019872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1621092 (or 1621081 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 54.

The spelling of 216099019872 in words is "two hundred sixteen billion, ninety-nine million, nineteen thousand, eight hundred seventy-two".