6581244516 has 48 divisors (see below), whose sum is σ = 19145441280. Its totient is φ = 1709413920.

The previous prime is 6581244487. The next prime is 6581244559. The reversal of 6581244516 is 6154421856.

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

It is an unprimeable number.

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, 3560356 + ... + 3562203.

It is an arithmetic number, because the mean of its divisors is an integer number (398863360).

Almost surely, 2^6581244516 is an apocalyptic number.

6581244516 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

6581244516 is an abundant number, since it is smaller than the sum of its proper divisors (12564196764).

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

6581244516 is a wasteful number, since it uses less digits than its factorization.

6581244516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7122584 (or 7122582 counting only the distinct ones).

The product of its digits is 230400, while the sum is 42.

The square root of 6581244516 is about 81124.8698982008. The cubic root of 6581244516 is about 1873.9989456721.

The spelling of 6581244516 in words is "six billion, five hundred eighty-one million, two hundred forty-four thousand, five hundred sixteen".