28641550273 has 4 divisors (see below), whose sum is σ = 32733200320. Its totient is φ = 24549900228.

The previous prime is 28641550213. The next prime is 28641550283. The reversal of 28641550273 is 37205514682.

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 not a de Polignac number, because 28641550273 - 2³³ = 20051615681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28641550213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2045825013 + ... + 2045825026.

It is an arithmetic number, because the mean of its divisors is an integer number (8183300080).

Almost surely, 2^28641550273 is an apocalyptic number.

It is an amenable number.

28641550273 is a deficient number, since it is larger than the sum of its proper divisors (4091650047).

28641550273 is an equidigital number, since it uses as much as digits as its factorization.

28641550273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4091650046.

The product of its (nonzero) digits is 403200, while the sum is 43.

The spelling of 28641550273 in words is "twenty-eight billion, six hundred forty-one million, five hundred fifty thousand, two hundred seventy-three".