8233844378721 has 16 divisors (see below), whose sum is σ = 12445216875840. Its totient is φ = 4800297936960.

The previous prime is 8233844378681. The next prime is 8233844378741. The reversal of 8233844378721 is 1278734483328.

It is not a de Polignac number, because 8233844378721 - 2⁶ = 8233844378657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8233844378741) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5555899650 + ... + 5555901131.

It is an arithmetic number, because the mean of its divisors is an integer number (777826054740).

Almost surely, 2^{8233844378721} is an apocalyptic number.

It is an amenable number.

8233844378721 is a deficient number, since it is larger than the sum of its proper divisors (4211372497119).

8233844378721 is a wasteful number, since it uses less digits than its factorization.

8233844378721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11111800816.

The product of its digits is 43352064, while the sum is 60.

The spelling of 8233844378721 in words is "eight trillion, two hundred thirty-three billion, eight hundred forty-four million, three hundred seventy-eight thousand, seven hundred twenty-one".