216765696 has 144 divisors (see below), whose sum is σ = 671151488. Its totient is φ = 60825600.

The previous prime is 216765683. The next prime is 216765701. The reversal of 216765696 is 696567612.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 327606 + ... + 328266.

Almost surely, 2^216765696 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 216765696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (335575744).

216765696 is an abundant number, since it is smaller than the sum of its proper divisors (454385792).

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

216765696 is an equidigital number, since it uses as much as digits as its factorization.

216765696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 748 (or 734 counting only the distinct ones).

The product of its digits is 816480, while the sum is 48.

The square root of 216765696 is about 14722.9649187927. The cubic root of 216765696 is about 600.7081416746.

It can be divided in two parts, 21676 and 5696, that added together give a palindrome (27372).

The spelling of 216765696 in words is "two hundred sixteen million, seven hundred sixty-five thousand, six hundred ninety-six".