13087552267661 has 4 divisors (see below), whose sum is σ = 13093030525500. Its totient is φ = 13082074009824.

The previous prime is 13087552267549. The next prime is 13087552267681. The reversal of 13087552267661 is 16676225578031.

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 3053165623561 + 10034386644100 = 1747331^2 + 3167710^2 .

It is a cyclic number.

It is not a de Polignac number, because 13087552267661 - 2¹⁰ = 13087552266637 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13087552267661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13087552267681) 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, 2739125336 + ... + 2739130113.

It is an arithmetic number, because the mean of its divisors is an integer number (3273257631375).

Almost surely, 2^{13087552267661} is an apocalyptic number.

It is an amenable number.

13087552267661 is a deficient number, since it is larger than the sum of its proper divisors (5478257839).

13087552267661 is an equidigital number, since it uses as much as digits as its factorization.

13087552267661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5478257838.

The product of its (nonzero) digits is 25401600, while the sum is 59.

The spelling of 13087552267661 in words is "thirteen trillion, eighty-seven billion, five hundred fifty-two million, two hundred sixty-seven thousand, six hundred sixty-one".