219917854116 has 45 divisors (see below), whose sum is σ = 574930778961. Its totient is φ = 73303137648.

The previous prime is 219917854087. The next prime is 219917854201. The reversal of 219917854116 is 611458719912.

The square root of 219917854116 is 468954.

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

219917854116 is a `hidden beast` number, since 2 + 1 + 9 + 91 + 7 + 8 + 541 + 1 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 184685062500 + 35232791616 = 429750^2 + 187704^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 8428146 + ... + 8454198.

Almost surely, 2^219917854116 is an apocalyptic number.

219917854116 is the 468954-th square number.

It is an amenable number.

219917854116 is an abundant number, since it is smaller than the sum of its proper divisors (355012924845).

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

219917854116 is an frugal number, since it uses more digits than its factorization.

219917854116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52122 (or 26058 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 54.

The spelling of 219917854116 in words is "two hundred nineteen billion, nine hundred seventeen million, eight hundred fifty-four thousand, one hundred sixteen".