28307580553 has 4 divisors (see below), whose sum is σ = 32351520640. Its totient is φ = 24263640468.

The previous prime is 28307580551. The next prime is 28307580569. The reversal of 28307580553 is 35508570382.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28307580553 - 2¹ = 28307580551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28307580551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2021970033 + ... + 2021970046.

It is an arithmetic number, because the mean of its divisors is an integer number (8087880160).

Almost surely, 2^28307580553 is an apocalyptic number.

It is an amenable number.

28307580553 is a deficient number, since it is larger than the sum of its proper divisors (4043940087).

28307580553 is an equidigital number, since it uses as much as digits as its factorization.

28307580553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4043940086.

The product of its (nonzero) digits is 1008000, while the sum is 46.

The spelling of 28307580553 in words is "twenty-eight billion, three hundred seven million, five hundred eighty thousand, five hundred fifty-three".