8144123646 has 64 divisors (see below), whose sum is σ = 17226639360. Its totient is φ = 2563284480.

The previous prime is 8144123633. The next prime is 8144123693. The reversal of 8144123646 is 6463214418.

It is a super-2 number, since 2×8144123646² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1500730 + ... + 1506146.

It is an arithmetic number, because the mean of its divisors is an integer number (269166240).

Almost surely, 2^8144123646 is an apocalyptic number.

8144123646 is an abundant number, since it is smaller than the sum of its proper divisors (9082515714).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8144123646 is a wasteful number, since it uses less digits than its factorization.

8144123646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5649.

The product of its digits is 110592, while the sum is 39.

The square root of 8144123646 is about 90244.7984429020. The cubic root of 8144123646 is about 2011.9388934338.

The spelling of 8144123646 in words is "eight billion, one hundred forty-four million, one hundred twenty-three thousand, six hundred forty-six".