6487625844 has 72 divisors (see below), whose sum is σ = 19388328960. Its totient is φ = 1789687872.

The previous prime is 6487625773. The next prime is 6487625887. The reversal of 6487625844 is 4485267846.

It is a happy number.

6487625844 is a `hidden beast` number, since 6 + 4 + 8 + 7 + 625 + 8 + 4 + 4 = 666.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 436564 + ... + 451179.

Almost surely, 2^6487625844 is an apocalyptic number.

It is an amenable number.

6487625844 is an abundant number, since it is smaller than the sum of its proper divisors (12900703116).

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

6487625844 is a wasteful number, since it uses less digits than its factorization.

6487625844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 887789 (or 887784 counting only the distinct ones).

The product of its digits is 10321920, while the sum is 54.

The square root of 6487625844 is about 80545.7996670217. The cubic root of 6487625844 is about 1865.0705523794.

The spelling of 6487625844 in words is "six billion, four hundred eighty-seven million, six hundred twenty-five thousand, eight hundred forty-four".