28571836539169 has 135 divisors (see below), whose sum is σ = 37611818681073. Its totient is φ = 21686801043600.

The previous prime is 28571836539167. The next prime is 28571836539229. The reversal of 28571836539169 is 96193563817582.

The square root of 28571836539169 is 5345263.

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

It is not a de Polignac number, because 28571836539169 - 2¹ = 28571836539167 is a prime.

It is a super-2 number, since 2×28571836539169² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28571836539161) by changing a digit.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 135411547474 + ... + 135411547684.

Almost surely, 2^{28571836539169} is an apocalyptic number.

28571836539169 is the 5345263-rd square number.

28571836539169 is the 2672632-nd centered octagonal number.

It is an amenable number.

28571836539169 is a deficient number, since it is larger than the sum of its proper divisors (9039982141904).

28571836539169 is an frugal number, since it uses more digits than its factorization.

28571836539169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566 (or 276 counting only the distinct ones).

The product of its digits is 587865600, while the sum is 73.

The spelling of 28571836539169 in words is "twenty-eight trillion, five hundred seventy-one billion, eight hundred thirty-six million, five hundred thirty-nine thousand, one hundred sixty-nine".