2778942567131 has 2 divisors, whose sum is σ = 2778942567132. Its totient is φ = 2778942567130.

The previous prime is 2778942567119. The next prime is 2778942567241. The reversal of 2778942567131 is 1317652498772.

2778942567131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2778942567131 - 2⁶ = 2778942567067 is a prime.

It is a super-3 number, since 3×2778942567131³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (2778942566131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1389471283565 + 1389471283566.

It is an arithmetic number, because the mean of its divisors is an integer number (1389471283566).

Almost surely, 2^{2778942567131} is an apocalyptic number.

2778942567131 is a deficient number, since it is larger than the sum of its proper divisors (1).

2778942567131 is an equidigital number, since it uses as much as digits as its factorization.

2778942567131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35562240, while the sum is 62.

The spelling of 2778942567131 in words is "two trillion, seven hundred seventy-eight billion, nine hundred forty-two million, five hundred sixty-seven thousand, one hundred thirty-one".