7776943396778 has 32 divisors (see below), whose sum is σ = 12427876065024. Its totient is φ = 3637150601472.

The previous prime is 7776943396757. The next prime is 7776943396793. The reversal of 7776943396778 is 8776933496777.

It is a junction number, because it is equal to n+sod(n) for n = 7776943396696 and 7776943396705.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31258400 + ... + 31506212.

It is an arithmetic number, because the mean of its divisors is an integer number (388371127032).

Almost surely, 2^{7776943396778} is an apocalyptic number.

7776943396778 is a deficient number, since it is larger than the sum of its proper divisors (4650932668246).

7776943396778 is a wasteful number, since it uses less digits than its factorization.

7776943396778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253526.

The product of its digits is 14114653056, while the sum is 83.

Subtracting 7776943396778 from its reverse (8776933496777), we obtain a palindrome (999990099999).

The spelling of 7776943396778 in words is "seven trillion, seven hundred seventy-six billion, nine hundred forty-three million, three hundred ninety-six thousand, seven hundred seventy-eight".