217580378039 has 8 divisors (see below), whose sum is σ = 232532302608. Its totient is φ = 202867684480.

The previous prime is 217580378033. The next prime is 217580378087. The reversal of 217580378039 is 930873085712.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 217580378039 - 2¹⁶ = 217580312503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217580378033) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59805872 + ... + 59809509.

It is an arithmetic number, because the mean of its divisors is an integer number (29066537826).

Almost surely, 2^217580378039 is an apocalyptic number.

217580378039 is a deficient number, since it is larger than the sum of its proper divisors (14951924569).

217580378039 is a wasteful number, since it uses less digits than its factorization.

217580378039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119615505.

The product of its (nonzero) digits is 2540160, while the sum is 53.

The spelling of 217580378039 in words is "two hundred seventeen billion, five hundred eighty million, three hundred seventy-eight thousand, thirty-nine".