6509493639 has 80 divisors (see below), whose sum is σ = 11012246784. Its totient is φ = 3797539200.

The previous prime is 6509493637. The next prime is 6509493703. The reversal of 6509493639 is 9363949056.

It is not a de Polignac number, because 6509493639 - 2¹ = 6509493637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6509493637) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 2719027 + ... + 2721419.

Almost surely, 2^6509493639 is an apocalyptic number.

6509493639 is a deficient number, since it is larger than the sum of its proper divisors (4502753145).

6509493639 is a wasteful number, since it uses less digits than its factorization.

6509493639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2530 (or 2521 counting only the distinct ones).

The product of its (nonzero) digits is 4723920, while the sum is 54.

The square root of 6509493639 is about 80681.4330499899. The cubic root of 6509493639 is about 1867.1637290694.

The spelling of 6509493639 in words is "six billion, five hundred nine million, four hundred ninety-three thousand, six hundred thirty-nine".