2778668898959 has 2 divisors, whose sum is σ = 2778668898960. Its totient is φ = 2778668898958.

The previous prime is 2778668898881. The next prime is 2778668899043. The reversal of 2778668898959 is 9598988668772.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2778668898959 - 2³⁶ = 2709949422223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2778668898659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1389334449479 + 1389334449480.

It is an arithmetic number, because the mean of its divisors is an integer number (1389334449480).

Almost surely, 2^{2778668898959} is an apocalyptic number.

2778668898959 is a deficient number, since it is larger than the sum of its proper divisors (1).

2778668898959 is an equidigital number, since it uses as much as digits as its factorization.

2778668898959 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52672757760, while the sum is 92.

The spelling of 2778668898959 in words is "two trillion, seven hundred seventy-eight billion, six hundred sixty-eight million, eight hundred ninety-eight thousand, nine hundred fifty-nine".