28110581313 has 4 divisors (see below), whose sum is σ = 37480775088. Its totient is φ = 18740387540.

The previous prime is 28110581309. The next prime is 28110581321. The reversal of 28110581313 is 31318501182.

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 28110581313 - 2² = 28110581309 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28110581333) 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, 4685096883 + ... + 4685096888.

It is an arithmetic number, because the mean of its divisors is an integer number (9370193772).

Almost surely, 2^28110581313 is an apocalyptic number.

It is an amenable number.

28110581313 is a deficient number, since it is larger than the sum of its proper divisors (9370193775).

28110581313 is an equidigital number, since it uses as much as digits as its factorization.

28110581313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9370193774.

The product of its (nonzero) digits is 5760, while the sum is 33.

The spelling of 28110581313 in words is "twenty-eight billion, one hundred ten million, five hundred eighty-one thousand, three hundred thirteen".