28155243327 has 4 divisors (see below), whose sum is σ = 37540324440. Its totient is φ = 18770162216.

The previous prime is 28155243313. The next prime is 28155243353. The reversal of 28155243327 is 72334255182.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28155243327 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28155243307) 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, 4692540552 + ... + 4692540557.

It is an arithmetic number, because the mean of its divisors is an integer number (9385081110).

Almost surely, 2^28155243327 is an apocalyptic number.

28155243327 is a deficient number, since it is larger than the sum of its proper divisors (9385081113).

28155243327 is an equidigital number, since it uses as much as digits as its factorization.

28155243327 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9385081112.

The product of its digits is 403200, while the sum is 42.

The spelling of 28155243327 in words is "twenty-eight billion, one hundred fifty-five million, two hundred forty-three thousand, three hundred twenty-seven".