13118728801 has 4 divisors (see below), whose sum is σ = 13119242004. Its totient is φ = 13118215600.

The previous prime is 13118728789. The next prime is 13118728879. The reversal of 13118728801 is 10882781131.

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 6407842401 + 6710886400 = 80049^2 + 81920^2 .

It is a cyclic number.

It is not a de Polignac number, because 13118728801 - 2³³ = 4528794209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13118726801) 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, 216130 + ... + 270091.

It is an arithmetic number, because the mean of its divisors is an integer number (3279810501).

Almost surely, 2^13118728801 is an apocalyptic number.

It is an amenable number.

13118728801 is a deficient number, since it is larger than the sum of its proper divisors (513203).

13118728801 is an equidigital number, since it uses as much as digits as its factorization.

13118728801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513202.

The product of its (nonzero) digits is 21504, while the sum is 40.

The spelling of 13118728801 in words is "thirteen billion, one hundred eighteen million, seven hundred twenty-eight thousand, eight hundred one".