216880168764 has 24 divisors (see below), whose sum is σ = 578347116928. Its totient is φ = 61965762480.

The previous prime is 216880168763. The next prime is 216880168801. The reversal of 216880168764 is 467861088612.

It is a super-2 number, since 2×216880168764² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216880168763) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1290953302 + ... + 1290953469.

Almost surely, 2^216880168764 is an apocalyptic number.

It is an amenable number.

216880168764 is an abundant number, since it is smaller than the sum of its proper divisors (361466948164).

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

216880168764 is a wasteful number, since it uses less digits than its factorization.

216880168764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2581906785 (or 2581906783 counting only the distinct ones).

The product of its (nonzero) digits is 6193152, while the sum is 57.

The spelling of 216880168764 in words is "two hundred sixteen billion, eight hundred eighty million, one hundred sixty-eight thousand, seven hundred sixty-four".