216638714177 has 16 divisors (see below), whose sum is σ = 221219424000. Its totient is φ = 212076843264.

The previous prime is 216638714147. The next prime is 216638714179. The reversal of 216638714177 is 771417836612.

It is a cyclic number.

It is not a de Polignac number, because 216638714177 - 2²² = 216634519873 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216638714179) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83033849 + ... + 83036457.

It is an arithmetic number, because the mean of its divisors is an integer number (13826214000).

Almost surely, 2^216638714177 is an apocalyptic number.

It is an amenable number.

216638714177 is a deficient number, since it is larger than the sum of its proper divisors (4580709823).

216638714177 is a wasteful number, since it uses less digits than its factorization.

216638714177 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5560.

The product of its digits is 2370816, while the sum is 53.

The spelling of 216638714177 in words is "two hundred sixteen billion, six hundred thirty-eight million, seven hundred fourteen thousand, one hundred seventy-seven".