12777776378888 has 8 divisors (see below), whose sum is σ = 23958330710430. Its totient is φ = 6388888189440.

The previous prime is 12777776378819. The next prime is 12777776378923. The reversal of 12777776378888 is 88887367777721.

It can be written as a sum of positive squares in only one way, i.e., 12739773995524 + 38002383364 = 3569282^2 + 194942^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 798611023673 + ... + 798611023688.

Almost surely, 2^{12777776378888} is an apocalyptic number.

It is an amenable number.

12777776378888 is a deficient number, since it is larger than the sum of its proper divisors (11180554331542).

12777776378888 is a wasteful number, since it uses less digits than its factorization.

12777776378888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1597222047367 (or 1597222047363 counting only the distinct ones).

The product of its digits is 17348050944, while the sum is 86.

The spelling of 12777776378888 in words is "twelve trillion, seven hundred seventy-seven billion, seven hundred seventy-six million, three hundred seventy-eight thousand, eight hundred eighty-eight".