216091464466 has 4 divisors (see below), whose sum is σ = 324137196702. Its totient is φ = 108045732232.

The previous prime is 216091464437. The next prime is 216091464497. The reversal of 216091464466 is 664464190612.

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., 112378482441 + 103712982025 = 335229^2 + 322045^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54022866115 + ... + 54022866118.

Almost surely, 2^216091464466 is an apocalyptic number.

216091464466 is a deficient number, since it is larger than the sum of its proper divisors (108045732236).

216091464466 is a wasteful number, since it uses less digits than its factorization.

216091464466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108045732235.

The product of its (nonzero) digits is 1492992, while the sum is 49.

The spelling of 216091464466 in words is "two hundred sixteen billion, ninety-one million, four hundred sixty-four thousand, four hundred sixty-six".