6255436581 has 6 divisors (see below), whose sum is σ = 9035630630. Its totient is φ = 4170291048.

The previous prime is 6255436553. The next prime is 6255436613. The reversal of 6255436581 is 1856345526.

6255436581 is a `hidden beast` number, since 6 + 25 + 5 + 43 + 6 + 581 = 666.

It can be written as a sum of positive squares in only one way, i.e., 5220785025 + 1034651556 = 72255^2 + 32166^2 .

It is not a de Polignac number, because 6255436581 - 2¹⁷ = 6255305509 is a prime.

It is a super-2 number, since 2×6255436581² = 78260973637825939122, 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 (6255436531) 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, 347524246 + ... + 347524263.

Almost surely, 2^6255436581 is an apocalyptic number.

It is an amenable number.

6255436581 is a deficient number, since it is larger than the sum of its proper divisors (2780194049).

6255436581 is a wasteful number, since it uses less digits than its factorization.

6255436581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 695048515 (or 695048512 counting only the distinct ones).

The product of its digits is 864000, while the sum is 45.

The square root of 6255436581 is about 79091.3179875010. The cubic root of 6255436581 is about 1842.5496888178.

The spelling of 6255436581 in words is "six billion, two hundred fifty-five million, four hundred thirty-six thousand, five hundred eighty-one".