1309440644206 has 12 divisors (see below), whose sum is σ = 2049571417032. Its totient is φ = 626250509324.

The previous prime is 1309440644201. The next prime is 1309440644219. The reversal of 1309440644206 is 6024460449031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1309440644201) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7676715 + ... + 7845433.

It is an arithmetic number, because the mean of its divisors is an integer number (170797618086).

Almost surely, 2^{1309440644206} is an apocalyptic number.

1309440644206 is a deficient number, since it is larger than the sum of its proper divisors (740130772826).

1309440644206 is an frugal number, since it uses more digits than its factorization.

1309440644206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337463 (or 168744 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 43.

The spelling of 1309440644206 in words is "one trillion, three hundred nine billion, four hundred forty million, six hundred forty-four thousand, two hundred six".