216776377 has 8 divisors (see below), whose sum is σ = 234353600. Its totient is φ = 199815984.

The previous prime is 216776369. The next prime is 216776383. The reversal of 216776377 is 773677612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 216776377 - 2³ = 216776369 is a prime.

It is a super-2 number, since 2×216776377² = 93983995250492258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (216773377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153477 + ... + 154882.

It is an arithmetic number, because the mean of its divisors is an integer number (29294200).

Almost surely, 2^216776377 is an apocalyptic number.

It is an amenable number.

216776377 is a deficient number, since it is larger than the sum of its proper divisors (17577223).

216776377 is a wasteful number, since it uses less digits than its factorization.

216776377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308415.

The product of its digits is 518616, while the sum is 46.

The square root of 216776377 is about 14723.3276469689. The cubic root of 216776377 is about 600.7180080240.

The spelling of 216776377 in words is "two hundred sixteen million, seven hundred seventy-six thousand, three hundred seventy-seven".