8144123647 has 12 divisors (see below), whose sum is σ = 8961153768. Its totient is φ = 7396017200.

The previous prime is 8144123633. The next prime is 8144123693. The reversal of 8144123647 is 7463214418.

It is not a de Polignac number, because 8144123647 - 2¹¹ = 8144121599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8144123147) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 82833 + ... + 152149.

It is an arithmetic number, because the mean of its divisors is an integer number (746762814).

Almost surely, 2^8144123647 is an apocalyptic number.

8144123647 is a deficient number, since it is larger than the sum of its proper divisors (817030121).

8144123647 is a wasteful number, since it uses less digits than its factorization.

8144123647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70310 (or 70299 counting only the distinct ones).

The product of its digits is 129024, while the sum is 40.

The square root of 8144123647 is about 90244.7984484424. The cubic root of 8144123647 is about 2011.9388935161.

The spelling of 8144123647 in words is "eight billion, one hundred forty-four million, one hundred twenty-three thousand, six hundred forty-seven".