216664553464322 has 4 divisors (see below), whose sum is σ = 324996830196486. Its totient is φ = 108332276732160.

The previous prime is 216664553464297. The next prime is 216664553464363. The reversal of 216664553464322 is 223464355466612.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 212325960245281 + 4338593219041 = 14571409^2 + 2082929^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54166138366079 + ... + 54166138366082.

Almost surely, 2^{216664553464322} is an apocalyptic number.

216664553464322 is a deficient number, since it is larger than the sum of its proper divisors (108332276732164).

216664553464322 is a wasteful number, since it uses less digits than its factorization.

216664553464322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108332276732163.

The product of its digits is 149299200, while the sum is 59.

The spelling of 216664553464322 in words is "two hundred sixteen trillion, six hundred sixty-four billion, five hundred fifty-three million, four hundred sixty-four thousand, three hundred twenty-two".