27171853993 has 4 divisors (see below), whose sum is σ = 27323652240. Its totient is φ = 27020055748.

The previous prime is 27171853937. The next prime is 27171853997. The reversal of 27171853993 is 39935817172.

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 a de Polignac number, because none of the positive numbers 2^k-27171853993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27171853997) 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, 75898855 + ... + 75899212.

It is an arithmetic number, because the mean of its divisors is an integer number (6830913060).

Almost surely, 2^27171853993 is an apocalyptic number.

It is an amenable number.

27171853993 is a deficient number, since it is larger than the sum of its proper divisors (151798247).

27171853993 is a wasteful number, since it uses less digits than its factorization.

27171853993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151798246.

The product of its digits is 2857680, while the sum is 55.

The spelling of 27171853993 in words is "twenty-seven billion, one hundred seventy-one million, eight hundred fifty-three thousand, nine hundred ninety-three".