218776965696 has 63 divisors (see below), whose sum is σ = 627116848761. Its totient is φ = 72921913344.

The previous prime is 218776965691. The next prime is 218776965721. The reversal of 218776965696 is 696569677812.

The square root of 218776965696 is 467736.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 3777823296 + 214999142400 = 61464^2 + 463680^2 .

It is a Harshad number since it is a multiple of its sum of digits (72).

It is not an unprimeable number, because it can be changed into a prime (218776965691) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 11215920 + ... + 11235408.

Almost surely, 2^218776965696 is an apocalyptic number.

218776965696 is the 467736-th square number.

It is an amenable number.

218776965696 is an abundant number, since it is smaller than the sum of its proper divisors (408339883065).

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

218776965696 is an frugal number, since it uses more digits than its factorization.

218776965696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38996 (or 19494 counting only the distinct ones).

The product of its digits is 411505920, while the sum is 72.

The spelling of 218776965696 in words is "two hundred eighteen billion, seven hundred seventy-six million, nine hundred sixty-five thousand, six hundred ninety-six".