8613748286721 has 40 divisors (see below), whose sum is σ = 13141833154560. Its totient is φ = 5620058664192.

The previous prime is 8613748286641. The next prime is 8613748286749. The reversal of 8613748286721 is 1276828473168.

It is a happy number.

8613748286721 is a `hidden beast` number, since 8 + 6 + 1 + 3 + 7 + 482 + 86 + 72 + 1 = 666.

It is not a de Polignac number, because 8613748286721 - 2¹⁸ = 8613748024577 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8613748286761) 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 39 ways as a sum of consecutive naturals, for example, 116796160 + ... + 116869886.

It is an arithmetic number, because the mean of its divisors is an integer number (328545828864).

Almost surely, 2^{8613748286721} is an apocalyptic number.

8613748286721 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

It is an amenable number.

8613748286721 is a deficient number, since it is larger than the sum of its proper divisors (4528084867839).

8613748286721 is a wasteful number, since it uses less digits than its factorization.

8613748286721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104475 (or 104466 counting only the distinct ones).

The product of its digits is 43352064, while the sum is 63.

The spelling of 8613748286721 in words is "eight trillion, six hundred thirteen billion, seven hundred forty-eight million, two hundred eighty-six thousand, seven hundred twenty-one".