28550382061 has 4 divisors (see below), whose sum is σ = 28647823932. Its totient is φ = 28452940192.

The previous prime is 28550381987. The next prime is 28550382071. The reversal of 28550382061 is 16028305582.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16028305582 = 2 ⋅8014152791.

It can be written as a sum of positive squares in 2 ways, for example, as 25641937161 + 2908444900 = 160131^2 + 53930^2 .

It is a cyclic number.

It is not a de Polignac number, because 28550382061 - 2⁷ = 28550381933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28550382071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48720496 + ... + 48721081.

It is an arithmetic number, because the mean of its divisors is an integer number (7161955983).

Almost surely, 2^28550382061 is an apocalyptic number.

It is an amenable number.

28550382061 is a deficient number, since it is larger than the sum of its proper divisors (97441871).

28550382061 is an equidigital number, since it uses as much as digits as its factorization.

28550382061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97441870.

The product of its (nonzero) digits is 115200, while the sum is 40.

The spelling of 28550382061 in words is "twenty-eight billion, five hundred fifty million, three hundred eighty-two thousand, sixty-one".