6408745939 has 4 divisors (see below), whose sum is σ = 6432394720. Its totient is φ = 6385097160.

The previous prime is 6408745907. The next prime is 6408745943. The reversal of 6408745939 is 9395478046.

6408745939 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9395478046 = 2 ⋅4697739023.

It is a cyclic number.

It is not a de Polignac number, because 6408745939 - 2⁵ = 6408745907 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6408745939.

It is not an unprimeable number, because it can be changed into a prime (6408245939) 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, 11823984 + ... + 11824525.

It is an arithmetic number, because the mean of its divisors is an integer number (1608098680).

Almost surely, 2^6408745939 is an apocalyptic number.

6408745939 is a deficient number, since it is larger than the sum of its proper divisors (23648781).

6408745939 is a wasteful number, since it uses less digits than its factorization.

6408745939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23648780.

The product of its (nonzero) digits is 6531840, while the sum is 55.

The square root of 6408745939 is about 80054.6434568289. The cubic root of 6408745939 is about 1857.4808787590.

The spelling of 6408745939 in words is "six billion, four hundred eight million, seven hundred forty-five thousand, nine hundred thirty-nine".