6388325329 has 9 divisors (see below), whose sum is σ = 6433967131. Its totient is φ = 6343006720.

The previous prime is 6388325311. The next prime is 6388325347. The reversal of 6388325329 is 9235238836.

The square root of 6388325329 is 79927.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (6388325311) and next prime (6388325347).

It can be written as a sum of positive squares in only one way, i.e., 6289283025 + 99042304 = 79305^2 + 9952^2 .

It is not a de Polignac number, because 6388325329 - 2³¹ = 4240841681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6388325309) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 20541084 + ... + 20541394.

Almost surely, 2^6388325329 is an apocalyptic number.

6388325329 is the 79927-th square number.

6388325329 is the 39964-th centered octagonal number.

It is an amenable number.

6388325329 is a deficient number, since it is larger than the sum of its proper divisors (45641802).

6388325329 is an frugal number, since it uses more digits than its factorization.

6388325329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1136 (or 568 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 49.

The cubic root of 6388325329 is about 1855.5059083215.

Multiplying 6388325329 by its sum of digits (49), we get a square (313027941121 = 559489²).

The spelling of 6388325329 in words is "six billion, three hundred eighty-eight million, three hundred twenty-five thousand, three hundred twenty-nine".