216894761364 has 192 divisors, whose sum is σ = 557238528000. Its totient is φ = 65432240640.

The previous prime is 216894761353. The next prime is 216894761381. The reversal of 216894761364 is 463167498612.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 77710809 + ... + 77713599.

It is an arithmetic number, because the mean of its divisors is an integer number (2902284000).

Almost surely, 2^216894761364 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216894761364, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (278619264000).

216894761364 is an abundant number, since it is smaller than the sum of its proper divisors (340343766636).

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

216894761364 is a wasteful number, since it uses less digits than its factorization.

216894761364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3038 (or 3036 counting only the distinct ones).

The product of its digits is 10450944, while the sum is 57.

The spelling of 216894761364 in words is "two hundred sixteen billion, eight hundred ninety-four million, seven hundred sixty-one thousand, three hundred sixty-four".