13240288673 has 4 divisors (see below), whose sum is σ = 13241760900. Its totient is φ = 13238816448.

The previous prime is 13240288631. The next prime is 13240288777. The reversal of 13240288673 is 37688204231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37688204231 = 191 ⋅197320441.

It can be written as a sum of positive squares in 2 ways, for example, as 11579481664 + 1660807009 = 107608^2 + 40753^2 .

It is a cyclic number.

It is not a de Polignac number, because 13240288673 - 2¹⁰ = 13240287649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13240288603) 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, 722540 + ... + 740637.

It is an arithmetic number, because the mean of its divisors is an integer number (3310440225).

Almost surely, 2^13240288673 is an apocalyptic number.

It is an amenable number.

13240288673 is a deficient number, since it is larger than the sum of its proper divisors (1472227).

13240288673 is an equidigital number, since it uses as much as digits as its factorization.

13240288673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1472226.

The product of its (nonzero) digits is 387072, while the sum is 44.

The spelling of 13240288673 in words is "thirteen billion, two hundred forty million, two hundred eighty-eight thousand, six hundred seventy-three".