6431320065 has 64 divisors (see below), whose sum is σ = 11267424000. Its totient is φ = 3119554560.

The previous prime is 6431320001. The next prime is 6431320067. The reversal of 6431320065 is 5600231346.

It is not a de Polignac number, because 6431320065 - 2⁶ = 6431320001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6431320067) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1115811 + ... + 1121559.

It is an arithmetic number, because the mean of its divisors is an integer number (176053500).

Almost surely, 2^6431320065 is an apocalyptic number.

It is an amenable number.

6431320065 is a deficient number, since it is larger than the sum of its proper divisors (4836103935).

6431320065 is a wasteful number, since it uses less digits than its factorization.

6431320065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5922.

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 6431320065 is about 80195.5115015797. The cubic root of 6431320065 is about 1859.6592493487.

The spelling of 6431320065 in words is "six billion, four hundred thirty-one million, three hundred twenty thousand, sixty-five".