216764149 has 8 divisors (see below), whose sum is σ = 248208320. Its totient is φ = 185439456.

The previous prime is 216764137. The next prime is 216764231. The reversal of 216764149 is 941467612.

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

It is a cyclic number.

It is not a de Polignac number, because 216764149 - 2¹¹ = 216762101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216764549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25944 + ... + 33265.

It is an arithmetic number, because the mean of its divisors is an integer number (31026040).

Almost surely, 2^216764149 is an apocalyptic number.

It is an amenable number.

216764149 is a deficient number, since it is larger than the sum of its proper divisors (31444171).

216764149 is an equidigital number, since it uses as much as digits as its factorization.

216764149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59739.

The product of its digits is 72576, while the sum is 40.

The square root of 216764149 is about 14722.9123817267. The cubic root of 216764149 is about 600.7067126390.

The spelling of 216764149 in words is "two hundred sixteen million, seven hundred sixty-four thousand, one hundred forty-nine".