977678876779 has 16 divisors (see below), whose sum is σ = 1080952270560. Its totient is φ = 876867040000.

The previous prime is 977678876767. The next prime is 977678876789.

It is a happy number.

977678876779 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 977678876779 - 2¹⁷ = 977678745707 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 977678876779.

It is not an unprimeable number, because it can be changed into a prime (977678876789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1253644 + ... + 1878025.

It is an arithmetic number, because the mean of its divisors is an integer number (67559516910).

Almost surely, 2^977678876779 is an apocalyptic number.

977678876779 is a deficient number, since it is larger than the sum of its proper divisors (103273393781).

977678876779 is a wasteful number, since it uses less digits than its factorization.

977678876779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3132062.

The product of its digits is 21956126976, while the sum is 88.

The spelling of 977678876779 in words is "nine hundred seventy-seven billion, six hundred seventy-eight million, eight hundred seventy-six thousand, seven hundred seventy-nine".