8043978513 has 24 divisors (see below), whose sum is σ = 10978914688. Its totient is φ = 5238716256.

The previous prime is 8043978497. The next prime is 8043978533. The reversal of 8043978513 is 3158793408.

It is not a de Polignac number, because 8043978513 - 2⁴ = 8043978497 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 (8043978533) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5652120 + ... + 5653542.

Almost surely, 2^8043978513 is an apocalyptic number.

It is an amenable number.

8043978513 is a deficient number, since it is larger than the sum of its proper divisors (2934936175).

8043978513 is a wasteful number, since it uses less digits than its factorization.

8043978513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2373 (or 2326 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 48.

The square root of 8043978513 is about 89688.2295120157. The cubic root of 8043978513 is about 2003.6581808602.

The spelling of 8043978513 in words is "eight billion, forty-three million, nine hundred seventy-eight thousand, five hundred thirteen".