7768794978677 has 6 divisors (see below), whose sum is σ = 7879755753174. Its totient is φ = 7659375326120.

The previous prime is 7768794978671. The next prime is 7768794978683.

7768794978677 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (7768794978671) and next prime (7768794978683).

It can be written as a sum of positive squares in only one way, i.e., 5900983489636 + 1867811489041 = 2429194^2 + 1366679^2 .

It is not a de Polignac number, because 7768794978677 - 2⁴ = 7768794978661 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 (7768794978671) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 770555858 + ... + 770565939.

It is an arithmetic number, because the mean of its divisors is an integer number (1313292625529).

Almost surely, 2^{7768794978677} is an apocalyptic number.

It is an amenable number.

7768794978677 is a deficient number, since it is larger than the sum of its proper divisors (110960774497).

7768794978677 is an equidigital number, since it uses as much as digits as its factorization.

7768794978677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1541121939 (or 1541121868 counting only the distinct ones).

The product of its digits is 87824507904, while the sum is 92.

The spelling of 7768794978677 in words is "seven trillion, seven hundred sixty-eight billion, seven hundred ninety-four million, nine hundred seventy-eight thousand, six hundred seventy-seven".