6465783540 has 48 divisors (see below), whose sum is σ = 18110191680. Its totient is φ = 1723637760.

The previous prime is 6465783539. The next prime is 6465783547. The reversal of 6465783540 is 453875646.

It is a super-2 number, since 2×6465783540² = 83612713572269863200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6465783540.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6465783547) 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, 183555 + ... + 215925.

It is an arithmetic number, because the mean of its divisors is an integer number (377295660).

Almost surely, 2^6465783540 is an apocalyptic number.

6465783540 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6465783540 is an abundant number, since it is smaller than the sum of its proper divisors (11644408140).

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

6465783540 is a wasteful number, since it uses less digits than its factorization.

6465783540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35712 (or 35710 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 48.

The square root of 6465783540 is about 80410.0960079019. The cubic root of 6465783540 is about 1862.9751149807.

The spelling of 6465783540 in words is "six billion, four hundred sixty-five million, seven hundred eighty-three thousand, five hundred forty".