13796616681 has 45 divisors (see below), whose sum is σ = 21346742439. Its totient is φ = 8879900400.

The previous prime is 13796616601. The next prime is 13796616683. The reversal of 13796616681 is 18661669731.

The square root of 13796616681 is 117459.

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

13796616681 is a `hidden beast` number, since 13 + 7 + 9 + 6 + 616 + 6 + 8 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 65464281 + 13731152400 = 8091^2 + 117180^2 .

It is not a de Polignac number, because 13796616681 - 2¹⁹ = 13796092393 is a prime.

It is a super-2 number, since 2×13796616681² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13796616683) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 32770851 + ... + 32771271.

Almost surely, 2^13796616681 is an apocalyptic number.

13796616681 is the 117459-th square number.

13796616681 is the 58730-th centered octagonal number.

It is an amenable number.

13796616681 is a deficient number, since it is larger than the sum of its proper divisors (7550125758).

13796616681 is an frugal number, since it uses more digits than its factorization.

13796616681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 916 (or 455 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 54.

The spelling of 13796616681 in words is "thirteen billion, seven hundred ninety-six million, six hundred sixteen thousand, six hundred eighty-one".