28155761273 has 4 divisors (see below), whose sum is σ = 28156291968. Its totient is φ = 28155230580.

The previous prime is 28155761219. The next prime is 28155761303. The reversal of 28155761273 is 37216755182.

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 28155761273 - 2⁶ = 28155761209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28151761273) 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, 175661 + ... + 295242.

It is an arithmetic number, because the mean of its divisors is an integer number (7039072992).

Almost surely, 2^28155761273 is an apocalyptic number.

It is an amenable number.

28155761273 is a deficient number, since it is larger than the sum of its proper divisors (530695).

28155761273 is an equidigital number, since it uses as much as digits as its factorization.

28155761273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530694.

The product of its digits is 705600, while the sum is 47.

The spelling of 28155761273 in words is "twenty-eight billion, one hundred fifty-five million, seven hundred sixty-one thousand, two hundred seventy-three".