6743817561 has 16 divisors (see below), whose sum is σ = 9689682240. Its totient is φ = 4147362240.

The previous prime is 6743817551. The next prime is 6743817569. The reversal of 6743817561 is 1657183476.

It is not a de Polignac number, because 6743817561 - 2⁹ = 6743817049 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6743817561.

It is not an unprimeable number, because it can be changed into a prime (6743817569) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6235 + ... + 116303.

It is an arithmetic number, because the mean of its divisors is an integer number (605605140).

Almost surely, 2^6743817561 is an apocalyptic number.

It is an amenable number.

6743817561 is a deficient number, since it is larger than the sum of its proper divisors (2945864679).

6743817561 is a wasteful number, since it uses less digits than its factorization.

6743817561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111656.

The product of its digits is 846720, while the sum is 48.

The square root of 6743817561 is about 82120.7498808919. The cubic root of 6743817561 is about 1889.3044071097.

The spelling of 6743817561 in words is "six billion, seven hundred forty-three million, eight hundred seventeen thousand, five hundred sixty-one".