13056404515481 has 4 divisors (see below), whose sum is σ = 13062955648692. Its totient is φ = 13049853382272.

The previous prime is 13056404515463. The next prime is 13056404515487. The reversal of 13056404515481 is 18451540465031.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12003695683225 + 1052708832256 = 3464635^2 + 1026016^2 .

It is a cyclic number.

It is not a de Polignac number, because 13056404515481 - 2¹⁸ = 13056404253337 is a prime.

It is a super-4 number, since 4×13056404515481⁴ (a number of 54 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13056404515487) 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, 3275563616 + ... + 3275567601.

It is an arithmetic number, because the mean of its divisors is an integer number (3265738912173).

Almost surely, 2^{13056404515481} is an apocalyptic number.

It is an amenable number.

13056404515481 is a deficient number, since it is larger than the sum of its proper divisors (6551133211).

13056404515481 is an equidigital number, since it uses as much as digits as its factorization.

13056404515481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6551133210.

The product of its (nonzero) digits is 1152000, while the sum is 47.

The spelling of 13056404515481 in words is "thirteen trillion, fifty-six billion, four hundred four million, five hundred fifteen thousand, four hundred eighty-one".