215604064010917 has 2 divisors, whose sum is σ = 215604064010918. Its totient is φ = 215604064010916.

The previous prime is 215604064010873. The next prime is 215604064010969. The reversal of 215604064010917 is 719010460406512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 154369542098916 + 61234521912001 = 12424554^2 + 7825249^2 .

It is a cyclic number.

It is not a de Polignac number, because 215604064010917 - 2³¹ = 215601916527269 is a prime.

It is a super-4 number, since 4×215604064010917⁴ (a number of 58 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215604064016917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107802032005458 + 107802032005459.

It is an arithmetic number, because the mean of its divisors is an integer number (107802032005459).

Almost surely, 2^{215604064010917} is an apocalyptic number.

It is an amenable number.

215604064010917 is a deficient number, since it is larger than the sum of its proper divisors (1).

215604064010917 is an equidigital number, since it uses as much as digits as its factorization.

215604064010917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 46.

The spelling of 215604064010917 in words is "two hundred fifteen trillion, six hundred four billion, sixty-four million, ten thousand, nine hundred seventeen".