13013554087861 has 4 divisors (see below), whose sum is σ = 13462297332300. Its totient is φ = 12564810843424.

The previous prime is 13013554087613. The next prime is 13013554087867. The reversal of 13013554087861 is 16878045531031.

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 10358137180836 + 2655416907025 = 3218406^2 + 1629545^2 .

It is a cyclic number.

It is not a de Polignac number, because 13013554087861 - 2⁹ = 13013554087349 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13013554087799 and 13013554087808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13013554087867) 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, 224371622176 + ... + 224371622233.

It is an arithmetic number, because the mean of its divisors is an integer number (3365574333075).

Almost surely, 2^{13013554087861} is an apocalyptic number.

It is an amenable number.

13013554087861 is a deficient number, since it is larger than the sum of its proper divisors (448743244439).

13013554087861 is an equidigital number, since it uses as much as digits as its factorization.

13013554087861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448743244438.

The product of its (nonzero) digits is 2419200, while the sum is 52.

The spelling of 13013554087861 in words is "thirteen trillion, thirteen billion, five hundred fifty-four million, eighty-seven thousand, eight hundred sixty-one".