2646276779 has 2 divisors, whose sum is σ = 2646276780. Its totient is φ = 2646276778.

The previous prime is 2646276757. The next prime is 2646276811. The reversal of 2646276779 is 9776726462.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2646276779 is a prime.

It is a super-2 number, since 2×2646276779² = 14005561582149229682, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2646276749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1323138389 + 1323138390.

It is an arithmetic number, because the mean of its divisors is an integer number (1323138390).

Almost surely, 2^2646276779 is an apocalyptic number.

2646276779 is a deficient number, since it is larger than the sum of its proper divisors (1).

2646276779 is an equidigital number, since it uses as much as digits as its factorization.

2646276779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10668672, while the sum is 56.

The square root of 2646276779 is about 51441.9748746099. The cubic root of 2646276779 is about 1383.1791123891.

The spelling of 2646276779 in words is "two billion, six hundred forty-six million, two hundred seventy-six thousand, seven hundred seventy-nine".