6386721932 has 12 divisors (see below), whose sum is σ = 11177323080. Its totient is φ = 3193201056.

The previous prime is 6386721871. The next prime is 6386721977. The reversal of 6386721932 is 2391276836.

It is a happy number.

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134303 + ... + 175529.

It is an arithmetic number, because the mean of its divisors is an integer number (931443590).

Almost surely, 2^6386721932 is an apocalyptic number.

It is an amenable number.

6386721932 is a deficient number, since it is larger than the sum of its proper divisors (4790601148).

6386721932 is a wasteful number, since it uses less digits than its factorization.

6386721932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79960 (or 79958 counting only the distinct ones).

The product of its digits is 653184, while the sum is 47.

The square root of 6386721932 is about 79916.9689865676. The cubic root of 6386721932 is about 1855.3506583724.

The spelling of 6386721932 in words is "six billion, three hundred eighty-six million, seven hundred twenty-one thousand, nine hundred thirty-two".