2640078773 has 2 divisors, whose sum is σ = 2640078774. Its totient is φ = 2640078772.

The previous prime is 2640078757. The next prime is 2640078803. The reversal of 2640078773 is 3778700462.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1595043844 + 1045034929 = 39938^2 + 32327^2 .

It is a cyclic number.

It is not a de Polignac number, because 2640078773 - 2⁴ = 2640078757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2640078473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1320039386 + 1320039387.

It is an arithmetic number, because the mean of its divisors is an integer number (1320039387).

Almost surely, 2^2640078773 is an apocalyptic number.

It is an amenable number.

2640078773 is a deficient number, since it is larger than the sum of its proper divisors (1).

2640078773 is an equidigital number, since it uses as much as digits as its factorization.

2640078773 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 395136, while the sum is 44.

The square root of 2640078773 is about 51381.6968676590. The cubic root of 2640078773 is about 1382.0983921981.

The spelling of 2640078773 in words is "two billion, six hundred forty million, seventy-eight thousand, seven hundred seventy-three".