217132437164 has 12 divisors (see below), whose sum is σ = 380238346488. Its totient is φ = 108492909600.

The previous prime is 217132437163. The next prime is 217132437169. The reversal of 217132437164 is 461734231712.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (217132437163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18320582 + ... + 18332429.

It is an arithmetic number, because the mean of its divisors is an integer number (31686528874).

Almost surely, 2^217132437164 is an apocalyptic number.

It is an amenable number.

217132437164 is a deficient number, since it is larger than the sum of its proper divisors (163105909324).

217132437164 is a wasteful number, since it uses less digits than its factorization.

217132437164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36654496 (or 36654494 counting only the distinct ones).

The product of its digits is 169344, while the sum is 41.

Adding to 217132437164 its reverse (461734231712), we get a palindrome (678866668876).

The spelling of 217132437164 in words is "two hundred seventeen billion, one hundred thirty-two million, four hundred thirty-seven thousand, one hundred sixty-four".