13161061403365 has 16 divisors (see below), whose sum is σ = 15847856262000. Its totient is φ = 10492463826432.

The previous prime is 13161061403317. The next prime is 13161061403407. The reversal of 13161061403365 is 56330416016131.

It can be written as a sum of positive squares in 8 ways, for example, as 2704071092836 + 10456990310529 = 1644406^2 + 3233727^2 .

It is a cyclic number.

It is not a de Polignac number, because 13161061403365 - 2¹¹ = 13161061401317 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36281911 + ... + 36642859.

It is an arithmetic number, because the mean of its divisors is an integer number (990491016375).

Almost surely, 2^{13161061403365} is an apocalyptic number.

It is an amenable number.

13161061403365 is a deficient number, since it is larger than the sum of its proper divisors (2686794858635).

13161061403365 is a wasteful number, since it uses less digits than its factorization.

13161061403365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386136.

The product of its (nonzero) digits is 116640, while the sum is 40.

Adding to 13161061403365 its reverse (56330416016131), we get a palindrome (69491477419496).

The spelling of 13161061403365 in words is "thirteen trillion, one hundred sixty-one billion, sixty-one million, four hundred three thousand, three hundred sixty-five".