28656081573 has 16 divisors (see below), whose sum is σ = 43694255616. Its totient is φ = 16364461680.

The previous prime is 28656081557. The next prime is 28656081577. The reversal of 28656081573 is 37518065682.

It is a happy number.

It is not a de Polignac number, because 28656081573 - 2⁴ = 28656081557 is a prime.

It is a super-2 number, since 2×28656081573² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28656081577) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 401311 + ... + 467292.

It is an arithmetic number, because the mean of its divisors is an integer number (2730890976).

Almost surely, 2^28656081573 is an apocalyptic number.

It is an amenable number.

28656081573 is a deficient number, since it is larger than the sum of its proper divisors (15038174043).

28656081573 is a wasteful number, since it uses less digits than its factorization.

28656081573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870184.

The product of its (nonzero) digits is 2419200, while the sum is 51.

The spelling of 28656081573 in words is "twenty-eight billion, six hundred fifty-six million, eighty-one thousand, five hundred seventy-three".