13056568581 has 8 divisors (see below), whose sum is σ = 19895723584. Its totient is φ = 7460896320.

The previous prime is 13056568579. The next prime is 13056568583. The reversal of 13056568581 is 18586565031.

It is an interprime number because it is at equal distance from previous prime (13056568579) and next prime (13056568583).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13056568581 - 2¹ = 13056568579 is a prime.

It is a super-2 number, since 2×13056568581² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 13056568581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13056568583) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 310870660 + ... + 310870701.

It is an arithmetic number, because the mean of its divisors is an integer number (2486965448).

Almost surely, 2^13056568581 is an apocalyptic number.

It is an amenable number.

13056568581 is a deficient number, since it is larger than the sum of its proper divisors (6839155003).

13056568581 is an equidigital number, since it uses as much as digits as its factorization.

13056568581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621741371.

The product of its (nonzero) digits is 864000, while the sum is 48.

The spelling of 13056568581 in words is "thirteen billion, fifty-six million, five hundred sixty-eight thousand, five hundred eighty-one".