28601808361 has 4 divisors (see below), whose sum is σ = 32687780992. Its totient is φ = 24515835732.

The previous prime is 28601808293. The next prime is 28601808397. The reversal of 28601808361 is 16380810682.

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 28601808361 - 2¹⁵ = 28601775593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28601808761) 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, 2042986305 + ... + 2042986318.

It is an arithmetic number, because the mean of its divisors is an integer number (8171945248).

Almost surely, 2^28601808361 is an apocalyptic number.

It is an amenable number.

28601808361 is a deficient number, since it is larger than the sum of its proper divisors (4085972631).

28601808361 is an equidigital number, since it uses as much as digits as its factorization.

28601808361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4085972630.

The product of its (nonzero) digits is 110592, while the sum is 43.

The spelling of 28601808361 in words is "twenty-eight billion, six hundred one million, eight hundred eight thousand, three hundred sixty-one".