13320640729 has 16 divisors (see below), whose sum is σ = 14959178496. Its totient is φ = 11754892800.

The previous prime is 13320640709. The next prime is 13320640741. The reversal of 13320640729 is 92704602331.

It is a cyclic number.

It is not a de Polignac number, because 13320640729 - 2²¹ = 13318543577 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13320640709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137449 + ... + 213385.

It is an arithmetic number, because the mean of its divisors is an integer number (934948656).

Almost surely, 2^13320640729 is an apocalyptic number.

It is an amenable number.

13320640729 is a deficient number, since it is larger than the sum of its proper divisors (1638537767).

13320640729 is a wasteful number, since it uses less digits than its factorization.

13320640729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76416.

The product of its (nonzero) digits is 54432, while the sum is 37.

The spelling of 13320640729 in words is "thirteen billion, three hundred twenty million, six hundred forty thousand, seven hundred twenty-nine".