6504953640 has 64 divisors (see below), whose sum is σ = 19524447360. Its totient is φ = 1733802240.

The previous prime is 6504953597. The next prime is 6504953657. The reversal of 6504953640 is 463594056.

It is a junction number, because it is equal to n+sod(n) for n = 6504953592 and 6504953601.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 254317 + ... + 278723.

It is an arithmetic number, because the mean of its divisors is an integer number (305069490).

Almost surely, 2^6504953640 is an apocalyptic number.

6504953640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6504953640 is an abundant number, since it is smaller than the sum of its proper divisors (13019493720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6504953640 is a wasteful number, since it uses less digits than its factorization.

6504953640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26642 (or 26638 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 42.

The square root of 6504953640 is about 80653.2928032080. The cubic root of 6504953640 is about 1866.7295481935.

The spelling of 6504953640 in words is "six billion, five hundred four million, nine hundred fifty-three thousand, six hundred forty".