978105307817 has 8 divisors (see below), whose sum is σ = 1079879683680. Its totient is φ = 878473550560.

The previous prime is 978105307771. The next prime is 978105307849. The reversal of 978105307817 is 718703501879.

It is a happy number.

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 978105307817 - 2¹⁰ = 978105306793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (978105307897) 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 in 7 ways as a sum of consecutive naturals, for example, 535653692 + ... + 535655517.

It is an arithmetic number, because the mean of its divisors is an integer number (134984960460).

Almost surely, 2^978105307817 is an apocalyptic number.

It is an amenable number.

978105307817 is a deficient number, since it is larger than the sum of its proper divisors (101774375863).

978105307817 is a wasteful number, since it uses less digits than its factorization.

978105307817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1071309303.

The product of its (nonzero) digits is 2963520, while the sum is 56.

The spelling of 978105307817 in words is "nine hundred seventy-eight billion, one hundred five million, three hundred seven thousand, eight hundred seventeen".