6245918081 has 4 divisors (see below), whose sum is σ = 6726373332. Its totient is φ = 5765462832.

The previous prime is 6245918053. The next prime is 6245918093. The reversal of 6245918081 is 1808195426.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2475958081 + 3769960000 = 49759^2 + 61400^2 .

It is a cyclic number.

It is not a de Polignac number, because 6245918081 - 2⁶ = 6245918017 is a prime.

It is a super-2 number, since 2×6245918081² = 78022985349125445122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6245918381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 240227606 + ... + 240227631.

It is an arithmetic number, because the mean of its divisors is an integer number (1681593333).

Almost surely, 2^6245918081 is an apocalyptic number.

It is an amenable number.

6245918081 is a deficient number, since it is larger than the sum of its proper divisors (480455251).

6245918081 is a wasteful number, since it uses less digits than its factorization.

6245918081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480455250.

The product of its (nonzero) digits is 138240, while the sum is 44.

The square root of 6245918081 is about 79031.1209650983. The cubic root of 6245918081 is about 1841.6146508362.

The spelling of 6245918081 in words is "six billion, two hundred forty-five million, nine hundred eighteen thousand, eighty-one".