28545273855 has 64 divisors (see below), whose sum is σ = 58100843520. Its totient is φ = 13025847168.

The previous prime is 28545273853. The next prime is 28545273863. The reversal of 28545273855 is 55837254582.

It is a happy number.

28545273855 is a `hidden beast` number, since 2 + 85 + 4 + 527 + 38 + 5 + 5 = 666.

It is not a de Polignac number, because 28545273855 - 2¹ = 28545273853 is a prime.

It is a super-2 number, since 2×28545273855² (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 (28545273853) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 505209 + ... + 558861.

It is an arithmetic number, because the mean of its divisors is an integer number (907825680).

Almost surely, 2^28545273855 is an apocalyptic number.

28545273855 is an abundant number, since it is smaller than the sum of its proper divisors (29555569665).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28545273855 is a wasteful number, since it uses less digits than its factorization.

28545273855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54237 (or 54231 counting only the distinct ones).

The product of its digits is 13440000, while the sum is 54.

The spelling of 28545273855 in words is "twenty-eight billion, five hundred forty-five million, two hundred seventy-three thousand, eight hundred fifty-five".