2781642371 has 2 divisors, whose sum is σ = 2781642372. Its totient is φ = 2781642370.

The previous prime is 2781642361. The next prime is 2781642397. The reversal of 2781642371 is 1732461872.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2781642371 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (2781642361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1390821185 + 1390821186.

It is an arithmetic number, because the mean of its divisors is an integer number (1390821186).

Almost surely, 2^2781642371 is an apocalyptic number.

2781642371 is a deficient number, since it is larger than the sum of its proper divisors (1).

2781642371 is an equidigital number, since it uses as much as digits as its factorization.

2781642371 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 112896, while the sum is 41.

The square root of 2781642371 is about 52741.2776769771. The cubic root of 2781642371 is about 1406.3727115804.

The spelling of 2781642371 in words is "two billion, seven hundred eighty-one million, six hundred forty-two thousand, three hundred seventy-one".