27794785717 has 4 divisors (see below), whose sum is σ = 28265883840. Its totient is φ = 27323687596.

The previous prime is 27794785699. The next prime is 27794785727. The reversal of 27794785717 is 71758749772.

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 27794785717 - 2⁷ = 27794785589 is a prime.

It is a super-2 number, since 2×27794785717² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27794785727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 235548973 + ... + 235549090.

It is an arithmetic number, because the mean of its divisors is an integer number (7066470960).

Almost surely, 2^27794785717 is an apocalyptic number.

It is an amenable number.

27794785717 is a deficient number, since it is larger than the sum of its proper divisors (471098123).

27794785717 is an equidigital number, since it uses as much as digits as its factorization.

27794785717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471098122.

The product of its digits is 48404160, while the sum is 64.

The spelling of 27794785717 in words is "twenty-seven billion, seven hundred ninety-four million, seven hundred eighty-five thousand, seven hundred seventeen".