13278016768 has 18 divisors (see below), whose sum is σ = 26504166794. Its totient is φ = 6639008256.

The previous prime is 13278016709. The next prime is 13278016769. The reversal of 13278016768 is 86761087231.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 12036722944 + 1241293824 = 109712^2 + 35232^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13278016769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25933371 + ... + 25933882.

Almost surely, 2^13278016768 is an apocalyptic number.

It is an amenable number.

13278016768 is a deficient number, since it is larger than the sum of its proper divisors (13226150026).

13278016768 is an frugal number, since it uses more digits than its factorization.

13278016768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51867269 (or 51867255 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 49.

The spelling of 13278016768 in words is "thirteen billion, two hundred seventy-eight million, sixteen thousand, seven hundred sixty-eight".