6487891536 has 80 divisors (see below), whose sum is σ = 19164539264. Its totient is φ = 1852733952.

The previous prime is 6487891523. The next prime is 6487891549. The reversal of 6487891536 is 6351987846.

It is an interprime number because it is at equal distance from previous prime (6487891523) and next prime (6487891549).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 895866 + ... + 903078.

Almost surely, 2^6487891536 is an apocalyptic number.

It is an amenable number.

6487891536 is an abundant number, since it is smaller than the sum of its proper divisors (12676647728).

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

6487891536 is a wasteful number, since it uses less digits than its factorization.

6487891536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9908 (or 9902 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 57.

The square root of 6487891536 is about 80547.4489726397. The cubic root of 6487891536 is about 1865.0960125181.

The spelling of 6487891536 in words is "six billion, four hundred eighty-seven million, eight hundred ninety-one thousand, five hundred thirty-six".