216899946983 has 6 divisors (see below), whose sum is σ = 221518100304. Its totient is φ = 212281929576.

The previous prime is 216899946979. The next prime is 216899946997. The reversal of 216899946983 is 389649998612.

It is not a de Polignac number, because 216899946983 - 2² = 216899946979 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 216899946983.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216899946583) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3158885 + ... + 3226817.

It is an arithmetic number, because the mean of its divisors is an integer number (36919683384).

Almost surely, 2^216899946983 is an apocalyptic number.

216899946983 is a deficient number, since it is larger than the sum of its proper divisors (4618153321).

216899946983 is an frugal number, since it uses more digits than its factorization.

216899946983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135913 (or 67980 counting only the distinct ones).

The product of its digits is 362797056, while the sum is 74.

The spelling of 216899946983 in words is "two hundred sixteen billion, eight hundred ninety-nine million, nine hundred forty-six thousand, nine hundred eighty-three".