8857256769 has 15 divisors (see below), whose sum is σ = 13232476147. Its totient is φ = 5904273168.

The previous prime is 8857256747. The next prime is 8857256797. The reversal of 8857256769 is 9676527588.

The square root of 8857256769 is 94113.

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

8857256769 is a `hidden beast` number, since 8 + 8 + 5 + 7 + 2 + 567 + 69 = 666.

It can be written as a sum of positive squares in only one way, i.e., 8011145025 + 846111744 = 89505^2 + 29088^2 .

It is not a de Polignac number, because 8857256769 - 2¹⁵ = 8857224001 is a prime.

It is a super-2 number, since 2×8857256769² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8857256069) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 841789 + ... + 852245.

Almost surely, 2^8857256769 is an apocalyptic number.

8857256769 is the 94113-rd square number.

8857256769 is the 47057-th centered octagonal number.

It is an amenable number.

8857256769 is a deficient number, since it is larger than the sum of its proper divisors (4375219378).

8857256769 is an frugal number, since it uses more digits than its factorization.

8857256769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20926 (or 10460 counting only the distinct ones).

The product of its digits is 50803200, while the sum is 63.

The cubic root of 8857256769 is about 2069.0282079955.

The spelling of 8857256769 in words is "eight billion, eight hundred fifty-seven million, two hundred fifty-six thousand, seven hundred sixty-nine".