978065296491 has 16 divisors (see below), whose sum is σ = 1305077973248. Its totient is φ = 651548253600.

The previous prime is 978065296487. The next prime is 978065296499. The reversal of 978065296491 is 194692560879.

It is not a de Polignac number, because 978065296491 - 2² = 978065296487 is a prime.

It is a super-2 number, since 2×978065296491² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (978065296499) 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, 25506465 + ... + 25544781.

It is an arithmetic number, because the mean of its divisors is an integer number (81567373328).

Almost surely, 2^978065296491 is an apocalyptic number.

978065296491 is a deficient number, since it is larger than the sum of its proper divisors (327012676757).

978065296491 is a wasteful number, since it uses less digits than its factorization.

978065296491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44562.

The product of its (nonzero) digits is 58786560, while the sum is 66.

The spelling of 978065296491 in words is "nine hundred seventy-eight billion, sixty-five million, two hundred ninety-six thousand, four hundred ninety-one".