13445596181 has 4 divisors (see below), whose sum is σ = 13447021452. Its totient is φ = 13444170912.

The previous prime is 13445596159. The next prime is 13445596193. The reversal of 13445596181 is 18169554431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18169554431 = 7 ⋅2595650633.

It can be written as a sum of positive squares in 2 ways, for example, as 556535281 + 12889060900 = 23591^2 + 113530^2 .

It is a cyclic number.

It is not a de Polignac number, because 13445596181 - 2²² = 13441401877 is a prime.

It is a super-2 number, since 2×13445596181² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13445596141) 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, 698390 + ... + 717383.

It is an arithmetic number, because the mean of its divisors is an integer number (3361755363).

Almost surely, 2^13445596181 is an apocalyptic number.

It is an amenable number.

13445596181 is a deficient number, since it is larger than the sum of its proper divisors (1425271).

13445596181 is an equidigital number, since it uses as much as digits as its factorization.

13445596181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1425270.

The product of its digits is 518400, while the sum is 47.

The spelling of 13445596181 in words is "thirteen billion, four hundred forty-five million, five hundred ninety-six thousand, one hundred eighty-one".