6271778449 has 2 divisors, whose sum is σ = 6271778450. Its totient is φ = 6271778448.

The previous prime is 6271778417. The next prime is 6271778473. The reversal of 6271778449 is 9448771726.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3481826049 + 2789952400 = 59007^2 + 52820^2 .

It is a cyclic number.

It is not a de Polignac number, because 6271778449 - 2⁵ = 6271778417 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6271778449.

It is not a weakly prime, because it can be changed into another prime (6271778749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3135889224 + 3135889225.

It is an arithmetic number, because the mean of its divisors is an integer number (3135889225).

Almost surely, 2^6271778449 is an apocalyptic number.

It is an amenable number.

6271778449 is a deficient number, since it is larger than the sum of its proper divisors (1).

6271778449 is an equidigital number, since it uses as much as digits as its factorization.

6271778449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4741632, while the sum is 55.

The square root of 6271778449 is about 79194.5607286258. The cubic root of 6271778449 is about 1844.1528021380.

The spelling of 6271778449 in words is "six billion, two hundred seventy-one million, seven hundred seventy-eight thousand, four hundred forty-nine".