13256646544 has 10 divisors (see below), whose sum is σ = 25684752710. Its totient is φ = 6628323264.

The previous prime is 13256646517. The next prime is 13256646577. The reversal of 13256646544 is 44564665231.

It can be written as a sum of positive squares in only one way, i.e., 10551398400 + 2705248144 = 102720^2 + 52012^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13256646494 and 13256646503.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 414270189 + ... + 414270220.

It is an arithmetic number, because the mean of its divisors is an integer number (2568475271).

Almost surely, 2^13256646544 is an apocalyptic number.

It is an amenable number.

13256646544 is a deficient number, since it is larger than the sum of its proper divisors (12428106166).

13256646544 is an equidigital number, since it uses as much as digits as its factorization.

13256646544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 828540417 (or 828540411 counting only the distinct ones).

The product of its digits is 2073600, while the sum is 46.

The spelling of 13256646544 in words is "thirteen billion, two hundred fifty-six million, six hundred forty-six thousand, five hundred forty-four".