8161453244681 has 32 divisors (see below), whose sum is σ = 9305917175808. Its totient is φ = 7085155271040.

The previous prime is 8161453244647. The next prime is 8161453244741. The reversal of 8161453244681 is 1864423541618.

It is a de Polignac number, because none of the positive numbers 2^k-8161453244681 is a prime.

It is a super-2 number, since 2×8161453244681² (a number of 27 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8161453244981) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 391294805 + ... + 391315661.

It is an arithmetic number, because the mean of its divisors is an integer number (290809911744).

Almost surely, 2^{8161453244681} is an apocalyptic number.

It is an amenable number.

8161453244681 is a deficient number, since it is larger than the sum of its proper divisors (1144463931127).

8161453244681 is a wasteful number, since it uses less digits than its factorization.

8161453244681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23381.

The product of its digits is 4423680, while the sum is 53.

The spelling of 8161453244681 in words is "eight trillion, one hundred sixty-one billion, four hundred fifty-three million, two hundred forty-four thousand, six hundred eighty-one".