216396020016 has 160 divisors (see below), whose sum is σ = 717463008000. Its totient is φ = 61717201920.

The previous prime is 216396020003. The next prime is 216396020021. The reversal of 216396020016 is 610020693612.

It is a happy number.

216396020016 is a `hidden beast` number, since 2 + 1 + 6 + 39 + 602 + 0 + 0 + 16 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1258566 + ... + 1420133.

It is an arithmetic number, because the mean of its divisors is an integer number (4484143800).

Almost surely, 2^216396020016 is an apocalyptic number.

It is an amenable number.

216396020016 is an abundant number, since it is smaller than the sum of its proper divisors (501066987984).

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

216396020016 is a wasteful number, since it uses less digits than its factorization.

216396020016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2678744 (or 2678732 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The spelling of 216396020016 in words is "two hundred sixteen billion, three hundred ninety-six million, twenty thousand, sixteen".