2645877779 has 2 divisors, whose sum is σ = 2645877780. Its totient is φ = 2645877778.

The previous prime is 2645877761. The next prime is 2645877821. The reversal of 2645877779 is 9777785462.

2645877779 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 2645877779 - 2²⁸ = 2377442323 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (2645871779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1322938889 + 1322938890.

It is an arithmetic number, because the mean of its divisors is an integer number (1322938890).

Almost surely, 2^2645877779 is an apocalyptic number.

2645877779 is a deficient number, since it is larger than the sum of its proper divisors (1).

2645877779 is an equidigital number, since it uses as much as digits as its factorization.

2645877779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41489280, while the sum is 62.

The square root of 2645877779 is about 51438.0965724822. The cubic root of 2645877779 is about 1383.1095912906.

The spelling of 2645877779 in words is "two billion, six hundred forty-five million, eight hundred seventy-seven thousand, seven hundred seventy-nine".