217396319794 has 16 divisors (see below), whose sum is σ = 330640814880. Its totient is φ = 107183429280.

The previous prime is 217396319737. The next prime is 217396319813. The reversal of 217396319794 is 497913693712.

217396319794 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×217396319794² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 439509 + ... + 792439.

It is an arithmetic number, because the mean of its divisors is an integer number (20665050930).

Almost surely, 2^217396319794 is an apocalyptic number.

217396319794 is a deficient number, since it is larger than the sum of its proper divisors (113244495086).

217396319794 is a wasteful number, since it uses less digits than its factorization.

217396319794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357225.

The product of its digits is 15431472, while the sum is 61.

The spelling of 217396319794 in words is "two hundred seventeen billion, three hundred ninety-six million, three hundred nineteen thousand, seven hundred ninety-four".