8128723421722 has 8 divisors (see below), whose sum is σ = 12197791078272. Its totient is φ = 4062793062300.

The previous prime is 8128723421719. The next prime is 8128723421723. The reversal of 8128723421722 is 2271243278218.

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

It is a super-2 number, since 2×8128723421722² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8128723421723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 784317804 + ... + 784328167.

It is an arithmetic number, because the mean of its divisors is an integer number (1524723884784).

Almost surely, 2^{8128723421722} is an apocalyptic number.

8128723421722 is a deficient number, since it is larger than the sum of its proper divisors (4069067656550).

8128723421722 is a wasteful number, since it uses less digits than its factorization.

8128723421722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1568648564.

The product of its digits is 1204224, while the sum is 49.

The spelling of 8128723421722 in words is "eight trillion, one hundred twenty-eight billion, seven hundred twenty-three million, four hundred twenty-one thousand, seven hundred twenty-two".