6508778329 has 3 divisors (see below), whose sum is σ = 6508859007. Its totient is φ = 6508697652.

The previous prime is 6508778327. The next prime is 6508778351. The reversal of 6508778329 is 9238778056.

The square root of 6508778329 is 80677.

It is a perfect power (a square), and thus also a powerful 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 can be written as a sum of positive squares in only one way, i.e., 831457225 + 5677321104 = 28835^2 + 75348^2 .

It is not a de Polignac number, because 6508778329 - 2¹ = 6508778327 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6508778329.

It is not an unprimeable number, because it can be changed into a prime (6508778323) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 40339 + ... + 121015.

It is an arithmetic number, because the mean of its divisors is an integer number (2169619669).

Almost surely, 2^6508778329 is an apocalyptic number.

6508778329 is the 80677-th square number.

6508778329 is the 40339-th centered octagonal number.

It is an amenable number.

6508778329 is a deficient number, since it is larger than the sum of its proper divisors (80678).

6508778329 is an frugal number, since it uses more digits than its factorization.

6508778329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161354 (or 80677 counting only the distinct ones).

The product of its (nonzero) digits is 5080320, while the sum is 55.

The cubic root of 6508778329 is about 1867.0953341022.

The spelling of 6508778329 in words is "six billion, five hundred eight million, seven hundred seventy-eight thousand, three hundred twenty-nine".