13012578643 has 4 divisors (see below), whose sum is σ = 13013002080. Its totient is φ = 13012155208.

The previous prime is 13012578613. The next prime is 13012578653. The reversal of 13012578643 is 34687521031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34687521031 = 6491 ⋅5343941.

It is a cyclic number.

It is not a de Polignac number, because 13012578643 - 2⁵ = 13012578611 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13012578596 and 13012578605.

It is not an unprimeable number, because it can be changed into a prime (13012578613) 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, 161680 + ... + 228397.

It is an arithmetic number, because the mean of its divisors is an integer number (3253250520).

Almost surely, 2^13012578643 is an apocalyptic number.

13012578643 is a deficient number, since it is larger than the sum of its proper divisors (423437).

13012578643 is an equidigital number, since it uses as much as digits as its factorization.

13012578643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423436.

The product of its (nonzero) digits is 120960, while the sum is 40.

The spelling of 13012578643 in words is "thirteen billion, twelve million, five hundred seventy-eight thousand, six hundred forty-three".