28060668121 has 4 divisors (see below), whose sum is σ = 28061126272. Its totient is φ = 28060209972.

The previous prime is 28060668059. The next prime is 28060668131. The reversal of 28060668121 is 12186606082.

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 a de Polignac number, because none of the positive numbers 2^k-28060668121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28060668131) 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, 119841 + ... + 265486.

It is an arithmetic number, because the mean of its divisors is an integer number (7015281568).

Almost surely, 2^28060668121 is an apocalyptic number.

It is an amenable number.

28060668121 is a deficient number, since it is larger than the sum of its proper divisors (458151).

28060668121 is an equidigital number, since it uses as much as digits as its factorization.

28060668121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458150.

The product of its (nonzero) digits is 55296, while the sum is 40.

The spelling of 28060668121 in words is "twenty-eight billion, sixty million, six hundred sixty-eight thousand, one hundred twenty-one".