12778026138513 has 6 divisors (see below), whose sum is σ = 18457148866754. Its totient is φ = 8518684092336.

The previous prime is 12778026138503. The next prime is 12778026138653. The reversal of 12778026138513 is 31583162087721.

12778026138513 is a `hidden beast` number, since 1 + 2 + 7 + 7 + 8 + 0 + 2 + 613 + 8 + 5 + 13 = 666.

It can be written as a sum of positive squares in only one way, i.e., 11134881588609 + 1643144549904 = 3336897^2 + 1281852^2 .

It is not a de Polignac number, because 12778026138513 - 2⁸ = 12778026138257 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12778026138513.

It is not an unprimeable number, because it can be changed into a prime (12778026138503) 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, 709890341020 + ... + 709890341037.

Almost surely, 2^{12778026138513} is an apocalyptic number.

It is an amenable number.

12778026138513 is a deficient number, since it is larger than the sum of its proper divisors (5679122728241).

12778026138513 is a wasteful number, since it uses less digits than its factorization.

12778026138513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1419780682063 (or 1419780682060 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 54.

The spelling of 12778026138513 in words is "twelve trillion, seven hundred seventy-eight billion, twenty-six million, one hundred thirty-eight thousand, five hundred thirteen".