6709739569 has 9 divisors (see below), whose sum is σ = 7266729249. Its totient is φ = 6192622800.

The previous prime is 6709739567. The next prime is 6709739573. The reversal of 6709739569 is 9659379076.

The square root of 6709739569 is 81913.

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

It can be written as a sum of positive squares in 4 ways, for example, as 486423025 + 6223316544 = 22055^2 + 78888^2 .

It is not a de Polignac number, because 6709739569 - 2¹ = 6709739567 is a prime.

It is a super-2 number, since 2×6709739569² = 90041210167608611522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6709739567) 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, 1061719 + ... + 1068019.

It is an arithmetic number, because the mean of its divisors is an integer number (807414361).

Almost surely, 2^6709739569 is an apocalyptic number.

6709739569 is the 81913-rd square number.

6709739569 is the 40957-th centered octagonal number.

It is an amenable number.

6709739569 is a deficient number, since it is larger than the sum of its proper divisors (556989680).

6709739569 is an frugal number, since it uses more digits than its factorization.

6709739569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12628 (or 6314 counting only the distinct ones).

The product of its (nonzero) digits is 19289340, while the sum is 61.

The cubic root of 6709739569 is about 1886.1166748548.

The spelling of 6709739569 in words is "six billion, seven hundred nine million, seven hundred thirty-nine thousand, five hundred sixty-nine".