27128628121 has 8 divisors (see below), whose sum is σ = 31007575424. Its totient is φ = 23250538080.

The previous prime is 27128628119. The next prime is 27128628161. The reversal of 27128628121 is 12182682172.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 27128628121 - 2¹ = 27128628119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27128628161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145005 + ... + 274378.

It is an arithmetic number, because the mean of its divisors is an integer number (3875946928).

Almost surely, 2^27128628121 is an apocalyptic number.

It is an amenable number.

27128628121 is a deficient number, since it is larger than the sum of its proper divisors (3878947303).

27128628121 is an equidigital number, since it uses as much as digits as its factorization.

27128628121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428631.

The product of its digits is 43008, while the sum is 40.

The spelling of 27128628121 in words is "twenty-seven billion, one hundred twenty-eight million, six hundred twenty-eight thousand, one hundred twenty-one".