6487885891 has 4 divisors (see below), whose sum is σ = 6488047552. Its totient is φ = 6487724232.

The previous prime is 6487885883. The next prime is 6487885897. The reversal of 6487885891 is 1985887846.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 6487885891 - 2³ = 6487885883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6487885897) 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 3 ways as a sum of consecutive naturals, for example, 30286 + ... + 117868.

It is an arithmetic number, because the mean of its divisors is an integer number (1622011888).

Almost surely, 2^6487885891 is an apocalyptic number.

6487885891 is a deficient number, since it is larger than the sum of its proper divisors (161661).

6487885891 is an equidigital number, since it uses as much as digits as its factorization.

6487885891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161660.

The product of its digits is 30965760, while the sum is 64.

The square root of 6487885891 is about 80547.4139311747. The cubic root of 6487885891 is about 1865.0954715889.

The spelling of 6487885891 in words is "six billion, four hundred eighty-seven million, eight hundred eighty-five thousand, eight hundred ninety-one".