977986749786863 has 4 divisors (see below), whose sum is σ = 994562796393480. Its totient is φ = 961410703180248.

The previous prime is 977986749786743. The next prime is 977986749786883. The reversal of 977986749786863 is 368687947689779.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 977986749786863 - 2¹⁴ = 977986749770479 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 (977986749786883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8288023303220 + ... + 8288023303337.

It is an arithmetic number, because the mean of its divisors is an integer number (248640699098370).

Almost surely, 2^{977986749786863} is an apocalyptic number.

977986749786863 is a deficient number, since it is larger than the sum of its proper divisors (16576046606617).

977986749786863 is a wasteful number, since it uses less digits than its factorization.

977986749786863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16576046606616.

The product of its digits is 2322868617216, while the sum is 104.

The spelling of 977986749786863 in words is "nine hundred seventy-seven trillion, nine hundred eighty-six billion, seven hundred forty-nine million, seven hundred eighty-six thousand, eight hundred sixty-three".