978446674739 has 16 divisors (see below), whose sum is σ = 993523492800. Its totient is φ = 963479721600.

The previous prime is 978446674727. The next prime is 978446674741. The reversal of 978446674739 is 937476644879.

It is a cyclic number.

It is not a de Polignac number, because 978446674739 - 2⁸ = 978446674483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (978446674789) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54117569 + ... + 54135645.

It is an arithmetic number, because the mean of its divisors is an integer number (62095218300).

Almost surely, 2^978446674739 is an apocalyptic number.

978446674739 is a deficient number, since it is larger than the sum of its proper divisors (15076818061).

978446674739 is a wasteful number, since it uses less digits than its factorization.

978446674739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21070.

The product of its digits is 1536288768, while the sum is 74.

The spelling of 978446674739 in words is "nine hundred seventy-eight billion, four hundred forty-six million, six hundred seventy-four thousand, seven hundred thirty-nine".