12776391959766 has 16 divisors (see below), whose sum is σ = 25902822056304. Its totient is φ = 4200457630464.

The previous prime is 12776391959713. The next prime is 12776391959857. The reversal of 12776391959766 is 66795919367721.

It is a junction number, because it is equal to n+sod(n) for n = 12776391959691 and 12776391959700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14584921891 + ... + 14584922766.

It is an arithmetic number, because the mean of its divisors is an integer number (1618926378519).

Almost surely, 2^{12776391959766} is an apocalyptic number.

12776391959766 is an abundant number, since it is smaller than the sum of its proper divisors (13126430096538).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12776391959766 is a wasteful number, since it uses less digits than its factorization.

12776391959766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29169844735.

The product of its digits is 1620304560, while the sum is 78.

The spelling of 12776391959766 in words is "twelve trillion, seven hundred seventy-six billion, three hundred ninety-one million, nine hundred fifty-nine thousand, seven hundred sixty-six".