6957728569 has 9 divisors (see below), whose sum is σ = 7648759909. Its totient is φ = 6324373660.

The previous prime is 6957728537. The next prime is 6957728581. The reversal of 6957728569 is 9658277596.

The square root of 6957728569 is 83413.

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

It is not a de Polignac number, because 6957728569 - 2⁵ = 6957728537 is a prime.

It is a super-2 number, since 2×6957728569² = 96819973679757575522, which contains 22 as substring.

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 6957728569.

It is not an unprimeable number, because it can be changed into a prime (6957728599) 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, 913752 + ... + 921334.

Almost surely, 2^6957728569 is an apocalyptic number.

6957728569 is the 83413-rd square number.

6957728569 is the 41707-th centered octagonal number.

It is an amenable number.

6957728569 is a deficient number, since it is larger than the sum of its proper divisors (691031340).

6957728569 is an frugal number, since it uses more digits than its factorization.

6957728569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15188 (or 7594 counting only the distinct ones).

The product of its digits is 57153600, while the sum is 64.

The cubic root of 6957728569 is about 1909.0728181711.

Multiplying 6957728569 by its sum of digits (64), we get a square (445294628416 = 667304²).

The spelling of 6957728569 in words is "six billion, nine hundred fifty-seven million, seven hundred twenty-eight thousand, five hundred sixty-nine".