28173554349 has 4 divisors (see below), whose sum is σ = 37564739136. Its totient is φ = 18782369564.

The previous prime is 28173554347. The next prime is 28173554363. The reversal of 28173554349 is 94345537182.

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 28173554349 - 2¹ = 28173554347 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28173554347) 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, 4695592389 + ... + 4695592394.

It is an arithmetic number, because the mean of its divisors is an integer number (9391184784).

Almost surely, 2^28173554349 is an apocalyptic number.

It is an amenable number.

28173554349 is a deficient number, since it is larger than the sum of its proper divisors (9391184787).

28173554349 is an equidigital number, since it uses as much as digits as its factorization.

28173554349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9391184786.

The product of its digits is 3628800, while the sum is 51.

The spelling of 28173554349 in words is "twenty-eight billion, one hundred seventy-three million, five hundred fifty-four thousand, three hundred forty-nine".