6399506793 has 64 divisors (see below), whose sum is σ = 9537454080. Its totient is φ = 3800520000.

The previous prime is 6399506749. The next prime is 6399506797. The reversal of 6399506793 is 3976059936.

It is not a de Polignac number, because 6399506793 - 2¹⁰ = 6399505769 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (6399506797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 20845146 + ... + 20845452.

It is an arithmetic number, because the mean of its divisors is an integer number (149022720).

Almost surely, 2^6399506793 is an apocalyptic number.

It is an amenable number.

6399506793 is a deficient number, since it is larger than the sum of its proper divisors (3137947287).

6399506793 is a wasteful number, since it uses less digits than its factorization.

6399506793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658.

The product of its (nonzero) digits is 8266860, while the sum is 57.

The square root of 6399506793 is about 79996.9173968597. The cubic root of 6399506793 is about 1856.5878392178.

The spelling of 6399506793 in words is "six billion, three hundred ninety-nine million, five hundred six thousand, seven hundred ninety-three".