84775892569 has 9 divisors (see below), whose sum is σ = 85092398239. Its totient is φ = 84460563040.

The previous prime is 84775892507. The next prime is 84775892609. The reversal of 84775892569 is 96529857748.

The square root of 84775892569 is 291163.

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

It can be written as a sum of positive squares in only one way, i.e., 52127739225 + 32648153344 = 228315^2 + 180688^2 .

It is not a de Polignac number, because 84775892569 - 2²¹ = 84773795417 is a prime.

It is a super-2 number, since 2×84775892569² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 84775892498 and 84775892507.

It is not an unprimeable number, because it can be changed into a prime (84775892269) 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, 142960737 + ... + 142961329.

Almost surely, 2^84775892569 is an apocalyptic number.

84775892569 is the 291163-rd square number.

84775892569 is the 145582-nd centered octagonal number.

It is an amenable number.

84775892569 is a deficient number, since it is larger than the sum of its proper divisors (316505670).

84775892569 is an frugal number, since it uses more digits than its factorization.

84775892569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2168 (or 1084 counting only the distinct ones).

The product of its digits is 304819200, while the sum is 70.

The spelling of 84775892569 in words is "eighty-four billion, seven hundred seventy-five million, eight hundred ninety-two thousand, five hundred sixty-nine".