8013887236161 has 27 divisors (see below), whose sum is σ = 11717791119619. Its totient is φ = 5277758654112.

The previous prime is 8013887236093. The next prime is 8013887236189. The reversal of 8013887236161 is 1616327883108.

It is a happy number.

The square root of 8013887236161 is 2830881.

It is a perfect power (a square), and thus also a powerful number.

8013887236161 is a `hidden beast` number, since 8 + 0 + 1 + 388 + 72 + 36 + 161 = 666.

It can be written as a sum of positive squares in only one way, i.e., 4618712476161 + 3395174760000 = 2149119^2 + 1842600^2 .

It is a de Polignac number, because none of the positive numbers 2^k-8013887236161 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 8013887236098 and 8013887236107.

It is not an unprimeable number, because it can be changed into a prime (8013887246161) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 704883685 + ... + 704895053.

Almost surely, 2^{8013887236161} is an apocalyptic number.

8013887236161 is the 2830881-st square number.

8013887236161 is the 1415441-st centered octagonal number.

It is an amenable number.

8013887236161 is a deficient number, since it is larger than the sum of its proper divisors (3703903883458).

8013887236161 is an frugal number, since it uses more digits than its factorization.

8013887236161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22910 (or 11455 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 54.

The spelling of 8013887236161 in words is "eight trillion, thirteen billion, eight hundred eighty-seven million, two hundred thirty-six thousand, one hundred sixty-one".