219947868196 has 81 divisors (see below), whose sum is σ = 452874537297. Its totient is φ = 93196897920.

The previous prime is 219947868139. The next prime is 219947868227. The reversal of 219947868196 is 691868749912.

The square root of 219947868196 is 468986.

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., 165416277796 + 54531590400 = 406714^2 + 233520^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 912646636 + ... + 912646876.

Almost surely, 2^219947868196 is an apocalyptic number.

219947868196 is the 468986-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 219947868196

219947868196 is an abundant number, since it is smaller than the sum of its proper divisors (232926669101).

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

219947868196 is an equidigital number, since it uses as much as digits as its factorization.

219947868196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778 (or 389 counting only the distinct ones).

The product of its digits is 94058496, while the sum is 70.

The spelling of 219947868196 in words is "two hundred nineteen billion, nine hundred forty-seven million, eight hundred sixty-eight thousand, one hundred ninety-six".