13073543257 has 4 divisors (see below), whose sum is σ = 13103876736. Its totient is φ = 13043209780.

The previous prime is 13073543221. The next prime is 13073543267. The reversal of 13073543257 is 75234537031.

13073543257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75234537031 = 6563 ⋅11463437.

It is a cyclic number.

It is not a de Polignac number, because 13073543257 - 2¹¹ = 13073541209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13073543267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15166093 + ... + 15166954.

It is an arithmetic number, because the mean of its divisors is an integer number (3275969184).

Almost surely, 2^13073543257 is an apocalyptic number.

It is an amenable number.

13073543257 is a deficient number, since it is larger than the sum of its proper divisors (30333479).

13073543257 is an equidigital number, since it uses as much as digits as its factorization.

13073543257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30333478.

The product of its (nonzero) digits is 264600, while the sum is 40.

The spelling of 13073543257 in words is "thirteen billion, seventy-three million, five hundred forty-three thousand, two hundred fifty-seven".