6243744561 has 32 divisors (see below), whose sum is σ = 8764538880. Its totient is φ = 3949477056.

The previous prime is 6243744517. The next prime is 6243744583. The reversal of 6243744561 is 1654473426.

It is a happy number.

It is not a de Polignac number, because 6243744561 - 2⁹ = 6243744049 is a prime.

It is a super-2 number, since 2×6243744561² = 77968692286034165442, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6243744061) 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 in 31 ways as a sum of consecutive naturals, for example, 827970 + ... + 835476.

It is an arithmetic number, because the mean of its divisors is an integer number (273891840).

Almost surely, 2^6243744561 is an apocalyptic number.

It is an amenable number.

6243744561 is a deficient number, since it is larger than the sum of its proper divisors (2520794319).

6243744561 is a wasteful number, since it uses less digits than its factorization.

6243744561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7733.

The product of its digits is 483840, while the sum is 42.

The square root of 6243744561 is about 79017.3687299191. The cubic root of 6243744561 is about 1841.4010045996.

The spelling of 6243744561 in words is "six billion, two hundred forty-three million, seven hundred forty-four thousand, five hundred sixty-one".