6495540072 has 64 divisors (see below), whose sum is σ = 18590584320. Its totient is φ = 1852678848.

The previous prime is 6495540071. The next prime is 6495540083. The reversal of 6495540072 is 2700455946.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (6495540071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65683 + ... + 131549.

It is an arithmetic number, because the mean of its divisors is an integer number (290477880).

Almost surely, 2^6495540072 is an apocalyptic number.

It is an amenable number.

6495540072 is an abundant number, since it is smaller than the sum of its proper divisors (12095044248).

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

6495540072 is a wasteful number, since it uses less digits than its factorization.

6495540072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66470 (or 66466 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 42.

The square root of 6495540072 is about 80594.9134375117. The cubic root of 6495540072 is about 1865.8286414903.

The spelling of 6495540072 in words is "six billion, four hundred ninety-five million, five hundred forty thousand, seventy-two".