8144426644 has 12 divisors (see below), whose sum is σ = 14257876500. Its totient is φ = 4070747648.

The previous prime is 8144426603. The next prime is 8144426663. The reversal of 8144426644 is 4466244418.

It can be written as a sum of positive squares in 2 ways, for example, as 1905322500 + 6239104144 = 43650^2 + 78988^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 8144426644.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 353869 + ... + 376180.

It is an arithmetic number, because the mean of its divisors is an integer number (1188156375).

Almost surely, 2^8144426644 is an apocalyptic number.

It is an amenable number.

8144426644 is a deficient number, since it is larger than the sum of its proper divisors (6113449856).

8144426644 is a wasteful number, since it uses less digits than its factorization.

8144426644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732842 (or 732840 counting only the distinct ones).

The product of its digits is 589824, while the sum is 43.

The square root of 8144426644 is about 90246.4771833228. The cubic root of 8144426644 is about 2011.9638441806.

The spelling of 8144426644 in words is "eight billion, one hundred forty-four million, four hundred twenty-six thousand, six hundred forty-four".