217015450564 has 24 divisors (see below), whose sum is σ = 423117168768. Its totient is φ = 96544590240.

The previous prime is 217015450507. The next prime is 217015450621. The reversal of 217015450564 is 465054510712.

It is an interprime number because it is at equal distance from previous prime (217015450507) and next prime (217015450621).

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, 52467819 + ... + 52471954.

It is an arithmetic number, because the mean of its divisors is an integer number (17629882032).

Almost surely, 2^217015450564 is an apocalyptic number.

It is an amenable number.

217015450564 is a deficient number, since it is larger than the sum of its proper divisors (206101718204).

217015450564 is a wasteful number, since it uses less digits than its factorization.

217015450564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104939835 (or 104939833 counting only the distinct ones).

The product of its (nonzero) digits is 168000, while the sum is 40.

The spelling of 217015450564 in words is "two hundred seventeen billion, fifteen million, four hundred fifty thousand, five hundred sixty-four".