217913470080 has 64 divisors (see below), whose sum is σ = 694599192000. Its totient is φ = 58110258176.

The previous prime is 217913470079. The next prime is 217913470091. The reversal of 217913470080 is 80074319712.

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56746380 + ... + 56750219.

It is an arithmetic number, because the mean of its divisors is an integer number (10853112375).

Almost surely, 2^217913470080 is an apocalyptic number.

217913470080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

217913470080 is an abundant number, since it is smaller than the sum of its proper divisors (476685721920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

217913470080 is a wasteful number, since it uses less digits than its factorization.

217913470080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113496621 (or 113496609 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 42.

Adding to 217913470080 its reverse (80074319712), we get a palindrome (297987789792).

The spelling of 217913470080 in words is "two hundred seventeen billion, nine hundred thirteen million, four hundred seventy thousand, eighty".