27830805749 has 4 divisors (see below), whose sum is σ = 27838700064. Its totient is φ = 27822911436.

The previous prime is 27830805733. The next prime is 27830805797. The reversal of 27830805749 is 94750803872.

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 27830805749 - 2⁴ = 27830805733 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27830805749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27830805049) 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, 3941867 + ... + 3948920.

It is an arithmetic number, because the mean of its divisors is an integer number (6959675016).

Almost surely, 2^27830805749 is an apocalyptic number.

It is an amenable number.

27830805749 is a deficient number, since it is larger than the sum of its proper divisors (7894315).

27830805749 is an equidigital number, since it uses as much as digits as its factorization.

27830805749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7894314.

The product of its (nonzero) digits is 3386880, while the sum is 53.

The spelling of 27830805749 in words is "twenty-seven billion, eight hundred thirty million, eight hundred five thousand, seven hundred forty-nine".