13256377873 has 4 divisors (see below), whose sum is σ = 13257216000. Its totient is φ = 13255539748.

The previous prime is 13256377859. The next prime is 13256377879. The reversal of 13256377873 is 37877365231.

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: 37877365231 = 919 ⋅41215849.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13256377873 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 13256377873.

It is not an unprimeable number, because it can be changed into a prime (13256377879) 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, 394873 + ... + 427126.

It is an arithmetic number, because the mean of its divisors is an integer number (3314304000).

Almost surely, 2^13256377873 is an apocalyptic number.

It is an amenable number.

13256377873 is a deficient number, since it is larger than the sum of its proper divisors (838127).

13256377873 is an equidigital number, since it uses as much as digits as its factorization.

13256377873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 838126.

The product of its digits is 4445280, while the sum is 52.

The spelling of 13256377873 in words is "thirteen billion, two hundred fifty-six million, three hundred seventy-seven thousand, eight hundred seventy-three".