13056623409 has 4 divisors (see below), whose sum is σ = 17408831216. Its totient is φ = 8704415604.

The previous prime is 13056623401. The next prime is 13056623413. The reversal of 13056623409 is 90432665031.

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.

It is not a de Polignac number, because 13056623409 - 2³ = 13056623401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13056623401) 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, 2176103899 + ... + 2176103904.

It is an arithmetic number, because the mean of its divisors is an integer number (4352207804).

Almost surely, 2^13056623409 is an apocalyptic number.

It is an amenable number.

13056623409 is a deficient number, since it is larger than the sum of its proper divisors (4352207807).

13056623409 is an equidigital number, since it uses as much as digits as its factorization.

13056623409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4352207806.

The product of its (nonzero) digits is 116640, while the sum is 39.

The spelling of 13056623409 in words is "thirteen billion, fifty-six million, six hundred twenty-three thousand, four hundred nine".