6729090644009 has 4 divisors (see below), whose sum is σ = 6893214806100. Its totient is φ = 6564966481920.

The previous prime is 6729090643991. The next prime is 6729090644033. The reversal of 6729090644009 is 9004460909276.

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 296638176025 + 6432452467984 = 544645^2 + 2536228^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6729090644009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6729090644509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82062080984 + ... + 82062081065.

It is an arithmetic number, because the mean of its divisors is an integer number (1723303701525).

Almost surely, 2^{6729090644009} is an apocalyptic number.

It is an amenable number.

6729090644009 is a deficient number, since it is larger than the sum of its proper divisors (164124162091).

6729090644009 is a wasteful number, since it uses less digits than its factorization.

6729090644009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164124162090.

The product of its (nonzero) digits is 5878656, while the sum is 56.

The spelling of 6729090644009 in words is "six trillion, seven hundred twenty-nine billion, ninety million, six hundred forty-four thousand, nine".