4249363581 has 6 divisors (see below), whose sum is σ = 6137969630. Its totient is φ = 2832909048.

The previous prime is 4249363553. The next prime is 4249363609. The reversal of 4249363581 is 1853639424.

4249363581 is a `hidden beast` number, since 4 + 2 + 4 + 9 + 3 + 63 + 581 = 666.

It is an interprime number because it is at equal distance from previous prime (4249363553) and next prime (4249363609).

It can be written as a sum of positive squares in only one way, i.e., 4239963225 + 9400356 = 65115^2 + 3066^2 .

It is not a de Polignac number, because 4249363581 - 2²³ = 4240974973 is a prime.

It is a super-2 number, since 2×4249363581² = 36114181687058287122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4249363511) 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 in 5 ways as a sum of consecutive naturals, for example, 236075746 + ... + 236075763.

Almost surely, 2^4249363581 is an apocalyptic number.

It is an amenable number.

4249363581 is a deficient number, since it is larger than the sum of its proper divisors (1888606049).

4249363581 is a wasteful number, since it uses less digits than its factorization.

4249363581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472151515 (or 472151512 counting only the distinct ones).

The product of its digits is 622080, while the sum is 45.

The square root of 4249363581 is about 65187.1427583692. The cubic root of 4249363581 is about 1619.7250436417.

The spelling of 4249363581 in words is "four billion, two hundred forty-nine million, three hundred sixty-three thousand, five hundred eighty-one".