8142307851721 has 8 divisors (see below), whose sum is σ = 8405050649600. Its totient is φ = 7879570535520.

The previous prime is 8142307851697. The next prime is 8142307851751. The reversal of 8142307851721 is 1271587032418.

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 8142307851721 - 2²⁹ = 8141770980809 is a prime.

It is a super-2 number, since 2×8142307851721² (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 (8142307851751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1761925 + ... + 4403293.

It is an arithmetic number, because the mean of its divisors is an integer number (1050631331200).

Almost surely, 2^{8142307851721} is an apocalyptic number.

It is an amenable number.

8142307851721 is a deficient number, since it is larger than the sum of its proper divisors (262742797879).

8142307851721 is a wasteful number, since it uses less digits than its factorization.

8142307851721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2740839.

The product of its (nonzero) digits is 752640, while the sum is 49.

The spelling of 8142307851721 in words is "eight trillion, one hundred forty-two billion, three hundred seven million, eight hundred fifty-one thousand, seven hundred twenty-one".