2782725761 has 2 divisors, whose sum is σ = 2782725762. Its totient is φ = 2782725760.

The previous prime is 2782725749. The next prime is 2782725797. The reversal of 2782725761 is 1675272872.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2596921600 + 185804161 = 50960^2 + 13631^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2782725761 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2782725661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1391362880 + 1391362881.

It is an arithmetic number, because the mean of its divisors is an integer number (1391362881).

Almost surely, 2^2782725761 is an apocalyptic number.

It is an amenable number.

2782725761 is a deficient number, since it is larger than the sum of its proper divisors (1).

2782725761 is an equidigital number, since it uses as much as digits as its factorization.

2782725761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 658560, while the sum is 47.

The square root of 2782725761 is about 52751.5474749320. The cubic root of 2782725761 is about 1406.5552718766. Note that the first 3 decimals are identical.

The spelling of 2782725761 in words is "two billion, seven hundred eighty-two million, seven hundred twenty-five thousand, seven hundred sixty-one".