27719960917 has 4 divisors (see below), whose sum is σ = 30239957376. Its totient is φ = 25199964460.

The previous prime is 27719960911. The next prime is 27719960951. The reversal of 27719960917 is 71906991772.

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 not a de Polignac number, because 27719960917 - 2⁷ = 27719960789 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27719960911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1259998213 + ... + 1259998234.

It is an arithmetic number, because the mean of its divisors is an integer number (7559989344).

Almost surely, 2^27719960917 is an apocalyptic number.

It is an amenable number.

27719960917 is a deficient number, since it is larger than the sum of its proper divisors (2519996459).

27719960917 is a wasteful number, since it uses less digits than its factorization.

27719960917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2519996458.

The product of its (nonzero) digits is 3000564, while the sum is 58.

The spelling of 27719960917 in words is "twenty-seven billion, seven hundred nineteen million, nine hundred sixty thousand, nine hundred seventeen".