6387929964 has 72 divisors (see below), whose sum is σ = 17500326480. Its totient is φ = 1952975232.

The previous prime is 6387929939. The next prime is 6387929971. The reversal of 6387929964 is 4699297836.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30007 + ... + 116945.

It is an arithmetic number, because the mean of its divisors is an integer number (243060090).

Almost surely, 2^6387929964 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6387929964, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8750163240).

6387929964 is an abundant number, since it is smaller than the sum of its proper divisors (11112396516).

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

6387929964 is a wasteful number, since it uses less digits than its factorization.

6387929964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87119 (or 87114 counting only the distinct ones).

The product of its digits is 35271936, while the sum is 63.

The square root of 6387929964 is about 79924.5266736063. The cubic root of 6387929964 is about 1855.4676292635.

The spelling of 6387929964 in words is "six billion, three hundred eighty-seven million, nine hundred twenty-nine thousand, nine hundred sixty-four".