978215946304 has 21 divisors (see below), whose sum is σ = 1941162969711. Its totient is φ = 489104016960.

The previous prime is 978215946271. The next prime is 978215946311. The reversal of 978215946304 is 403649512879.

The square root of 978215946304 is 989048.

It is a perfect power (a square), and thus also a powerful number.

It is a super-2 number, since 2×978215946304² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 7850569 + ... + 7974199.

It is an arithmetic number, because the mean of its divisors is an integer number (92436331891).

It is a 1-persistent number, because it is pandigital, but 2⋅978215946304 = 1956431892608 is not.

Almost surely, 2^978215946304 is an apocalyptic number.

978215946304 is the 989048-th square number.

It is an amenable number.

978215946304 is a deficient number, since it is larger than the sum of its proper divisors (962947023407).

978215946304 is an frugal number, since it uses more digits than its factorization.

978215946304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247274 (or 123633 counting only the distinct ones).

The product of its (nonzero) digits is 13063680, while the sum is 58.

The spelling of 978215946304 in words is "nine hundred seventy-eight billion, two hundred fifteen million, nine hundred forty-six thousand, three hundred four".