13516029377681 has 4 divisors (see below), whose sum is σ = 13519859369700. Its totient is φ = 13512199385664.

The previous prime is 13516029377597. The next prime is 13516029377701. The reversal of 13516029377681 is 18677392061531.

It is a happy number.

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 365832635281 + 13150196742400 = 604841^2 + 3626320^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13516029377681 is a prime.

It is a super-2 number, since 2×13516029377681² (a number of 27 digits) contains 22 as substring.

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 13516029377681.

It is not an unprimeable number, because it can be changed into a prime (13516029377881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1914990716 + ... + 1914997773.

It is an arithmetic number, because the mean of its divisors is an integer number (3379964842425).

Almost surely, 2^{13516029377681} is an apocalyptic number.

It is an amenable number.

13516029377681 is a deficient number, since it is larger than the sum of its proper divisors (3829992019).

13516029377681 is an equidigital number, since it uses as much as digits as its factorization.

13516029377681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3829992018.

The product of its (nonzero) digits is 11430720, while the sum is 59.

The spelling of 13516029377681 in words is "thirteen trillion, five hundred sixteen billion, twenty-nine million, three hundred seventy-seven thousand, six hundred eighty-one".