8241456721681 has 8 divisors (see below), whose sum is σ = 8274404777184. Its totient is φ = 8208509568000.

The previous prime is 8241456721643. The next prime is 8241456721699. The reversal of 8241456721681 is 1861276541428.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8241456721681 - 2¹³ = 8241456713489 is a prime.

It is a super-2 number, since 2×8241456721681² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8241456724681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22760010 + ... + 23119276.

It is an arithmetic number, because the mean of its divisors is an integer number (1034300597148).

Almost surely, 2^{8241456721681} is an apocalyptic number.

It is an amenable number.

8241456721681 is a deficient number, since it is larger than the sum of its proper divisors (32948055503).

8241456721681 is a wasteful number, since it uses less digits than its factorization.

8241456721681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450911.

The product of its digits is 5160960, while the sum is 55.

The spelling of 8241456721681 in words is "eight trillion, two hundred forty-one billion, four hundred fifty-six million, seven hundred twenty-one thousand, six hundred eighty-one".