6749647445 has 16 divisors (see below), whose sum is σ = 8630664048. Its totient is φ = 5049707520.

The previous prime is 6749647441. The next prime is 6749647451. The reversal of 6749647445 is 5447469476.

It can be written as a sum of positive squares in 8 ways, for example, as 609201124 + 6140446321 = 24682^2 + 78361^2 .

It is not a de Polignac number, because 6749647445 - 2² = 6749647441 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6749647441) 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 15 ways as a sum of consecutive naturals, for example, 239546 + ... + 266235.

It is an arithmetic number, because the mean of its divisors is an integer number (539416503).

Almost surely, 2^6749647445 is an apocalyptic number.

It is an amenable number.

6749647445 is a deficient number, since it is larger than the sum of its proper divisors (1881016603).

6749647445 is a wasteful number, since it uses less digits than its factorization.

6749647445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505960.

The product of its digits is 20321280, while the sum is 56.

The square root of 6749647445 is about 82156.2380163552. The cubic root of 6749647445 is about 1889.8486711979.

The spelling of 6749647445 in words is "six billion, seven hundred forty-nine million, six hundred forty-seven thousand, four hundred forty-five".