216204126984 has 24 divisors (see below), whose sum is σ = 585552844110. Its totient is φ = 72068042304.

The previous prime is 216204126977. The next prime is 216204127057. The reversal of 216204126984 is 489621402612.

It is a happy number.

216204126984 is a `hidden beast` number, since 2 + 1 + 620 + 4 + 12 + 6 + 9 + 8 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 156877782084 + 59326344900 = 396078^2 + 243570^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1501417477 + ... + 1501417620.

Almost surely, 2^216204126984 is an apocalyptic number.

216204126984 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

216204126984 is an abundant number, since it is smaller than the sum of its proper divisors (369348717126).

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

216204126984 is a wasteful number, since it uses less digits than its factorization.

216204126984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3002835109 (or 3002835102 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The spelling of 216204126984 in words is "two hundred sixteen billion, two hundred four million, one hundred twenty-six thousand, nine hundred eighty-four".