217080070790 has 32 divisors (see below), whose sum is σ = 426312854784. Its totient is φ = 78929590240.

The previous prime is 217080070783. The next prime is 217080070841. The reversal of 217080070790 is 97070080712.

It is a super-2 number, since 2×217080070790² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 951647 + ... + 1157493.

It is an arithmetic number, because the mean of its divisors is an integer number (13322276712).

Almost surely, 2^217080070790 is an apocalyptic number.

217080070790 is a deficient number, since it is larger than the sum of its proper divisors (209232783994).

217080070790 is a wasteful number, since it uses less digits than its factorization.

217080070790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215452.

The product of its (nonzero) digits is 49392, while the sum is 41.

The spelling of 217080070790 in words is "two hundred seventeen billion, eighty million, seventy thousand, seven hundred ninety".