216554345316 has 135 divisors (see below), whose sum is σ = 573952092483. Its totient is φ = 71199162000.

The previous prime is 216554345309. The next prime is 216554345321. The reversal of 216554345316 is 613543455612.

It is a happy number.

The square root of 216554345316 is 465354.

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

216554345316 is a `hidden beast` number, since 2 + 1 + 6 + 554 + 34 + 53 + 16 = 666.

It is a super-2 number, since 2×216554345316² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 862766191 + ... + 862766441.

Almost surely, 2^216554345316 is an apocalyptic number.

216554345316 is the 465354-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216554345316

216554345316 is an abundant number, since it is smaller than the sum of its proper divisors (357397747167).

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

216554345316 is an equidigital number, since it uses as much as digits as its factorization.

216554345316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 724 (or 359 counting only the distinct ones).

The product of its digits is 1296000, while the sum is 45.

The spelling of 216554345316 in words is "two hundred sixteen billion, five hundred fifty-four million, three hundred forty-five thousand, three hundred sixteen".