6744543137 has 4 divisors (see below), whose sum is σ = 6977113620. Its totient is φ = 6511972656.

The previous prime is 6744543133. The next prime is 6744543139. The reversal of 6744543137 is 7313454476.

It is a happy number.

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 5183424016 + 1561119121 = 71996^2 + 39511^2 .

It is a cyclic number.

It is not a de Polignac number, because 6744543137 - 2² = 6744543133 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6744543133) 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, 116285198 + ... + 116285255.

It is an arithmetic number, because the mean of its divisors is an integer number (1744278405).

Almost surely, 2^6744543137 is an apocalyptic number.

It is an amenable number.

6744543137 is a deficient number, since it is larger than the sum of its proper divisors (232570483).

6744543137 is a wasteful number, since it uses less digits than its factorization.

6744543137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232570482.

The product of its digits is 846720, while the sum is 44.

The square root of 6744543137 is about 82125.1675005902. The cubic root of 6744543137 is about 1889.3721622431.

The spelling of 6744543137 in words is "six billion, seven hundred forty-four million, five hundred forty-three thousand, one hundred thirty-seven".