2691319015729 has 8 divisors (see below), whose sum is σ = 2695054981320. Its totient is φ = 2687585058816.

The previous prime is 2691319015703. The next prime is 2691319015741. The reversal of 2691319015729 is 9275109131962.

2691319015729 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1842751950400 + 848567065329 = 1357480^2 + 921177^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2691319015729 - 2¹¹ = 2691319013681 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2691319015729.

It is not an unprimeable number, because it can be changed into a prime (2691319055729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2189377 + ... + 3189985.

It is an arithmetic number, because the mean of its divisors is an integer number (336881872665).

Almost surely, 2^{2691319015729} is an apocalyptic number.

It is an amenable number.

2691319015729 is a deficient number, since it is larger than the sum of its proper divisors (3735965591).

2691319015729 is a wasteful number, since it uses less digits than its factorization.

2691319015729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1004339.

The product of its (nonzero) digits is 1837080, while the sum is 55.

The spelling of 2691319015729 in words is "two trillion, six hundred ninety-one billion, three hundred nineteen million, fifteen thousand, seven hundred twenty-nine".