216684767987772 has 96 divisors (see below), whose sum is σ = 597295179694080. Its totient is φ = 59829510548160.

The previous prime is 216684767987761. The next prime is 216684767987867. The reversal of 216684767987772 is 277789767486612.

216684767987772 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 55994398 + ... + 59738949.

It is an arithmetic number, because the mean of its divisors is an integer number (6221824788480).

Almost surely, 2^{216684767987772} is an apocalyptic number.

It is an amenable number.

216684767987772 is an abundant number, since it is smaller than the sum of its proper divisors (380610411706308).

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

216684767987772 is a wasteful number, since it uses less digits than its factorization.

216684767987772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115734111 (or 115734109 counting only the distinct ones).

The product of its digits is 33456955392, while the sum is 87.

The spelling of 216684767987772 in words is "two hundred sixteen trillion, six hundred eighty-four billion, seven hundred sixty-seven million, nine hundred eighty-seven thousand, seven hundred seventy-two".