6465840764 has 12 divisors (see below), whose sum is σ = 11404318464. Its totient is φ = 3207464064.

The previous prime is 6465840757. The next prime is 6465840767. The reversal of 6465840764 is 4670485646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6465840767) 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, 6363509 + ... + 6364524.

It is an arithmetic number, because the mean of its divisors is an integer number (950359872).

Almost surely, 2^6465840764 is an apocalyptic number.

It is an amenable number.

6465840764 is a deficient number, since it is larger than the sum of its proper divisors (4938477700).

6465840764 is a wasteful number, since it uses less digits than its factorization.

6465840764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12728164 (or 12728162 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 50.

The square root of 6465840764 is about 80410.4518330795. The cubic root of 6465840764 is about 1862.9806109154.

The spelling of 6465840764 in words is "six billion, four hundred sixty-five million, eight hundred forty thousand, seven hundred sixty-four".