978284646482879 has 16 divisors (see below), whose sum is σ = 1022628457838592. Its totient is φ = 934091771678208.

The previous prime is 978284646482867. The next prime is 978284646482881.

It is a happy number.

978284646482879 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 978284646482879 - 2¹⁶ = 978284646417343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978284646482179) 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, 336471962 + ... + 339366984.

It is an arithmetic number, because the mean of its divisors is an integer number (63914278614912).

Almost surely, 2^{978284646482879} is an apocalyptic number.

978284646482879 is a deficient number, since it is larger than the sum of its proper divisors (44343811355713).

978284646482879 is a wasteful number, since it uses less digits than its factorization.

978284646482879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2921086.

The product of its digits is 149824733184, while the sum is 92.

The spelling of 978284646482879 in words is "nine hundred seventy-eight trillion, two hundred eighty-four billion, six hundred forty-six million, four hundred eighty-two thousand, eight hundred seventy-nine".