13232636036561 has 4 divisors (see below), whose sum is σ = 13232758813092. Its totient is φ = 13232513260032.

The previous prime is 13232636036551. The next prime is 13232636036677. The reversal of 13232636036561 is 16563063623231.

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 12632195472400 + 600440564161 = 3554180^2 + 774881^2 .

It is a cyclic number.

It is not a de Polignac number, because 13232636036561 - 2³⁰ = 13231562294737 is a prime.

It is a super-3 number, since 3×13232636036561³ (a number of 40 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13232636036531) 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, 61226456 + ... + 61442201.

It is an arithmetic number, because the mean of its divisors is an integer number (3308189703273).

Almost surely, 2^{13232636036561} is an apocalyptic number.

It is an amenable number.

13232636036561 is a deficient number, since it is larger than the sum of its proper divisors (122776531).

13232636036561 is a wasteful number, since it uses less digits than its factorization.

13232636036561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122776530.

The product of its (nonzero) digits is 2099520, while the sum is 47.

Adding to 13232636036561 its reverse (16563063623231), we get a palindrome (29795699659792).

The spelling of 13232636036561 in words is "thirteen trillion, two hundred thirty-two billion, six hundred thirty-six million, thirty-six thousand, five hundred sixty-one".