2567781247 has 2 divisors, whose sum is σ = 2567781248. Its totient is φ = 2567781246.

The previous prime is 2567781233. The next prime is 2567781253. The reversal of 2567781247 is 7421877652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2567781247 - 2¹¹ = 2567779199 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2567781247.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2567781257) 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, 1283890623 + 1283890624.

It is an arithmetic number, because the mean of its divisors is an integer number (1283890624).

Almost surely, 2^2567781247 is an apocalyptic number.

2567781247 is a deficient number, since it is larger than the sum of its proper divisors (1).

2567781247 is an equidigital number, since it uses as much as digits as its factorization.

2567781247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1317120, while the sum is 49.

The square root of 2567781247 is about 50673.2794182496. The cubic root of 2567781247 is about 1369.3653705462.

The spelling of 2567781247 in words is "two billion, five hundred sixty-seven million, seven hundred eighty-one thousand, two hundred forty-seven".