27215572117 has 4 divisors (see below), whose sum is σ = 27237681856. Its totient is φ = 27193462380.

The previous prime is 27215572099. The next prime is 27215572121. The reversal of 27215572117 is 71127551272.

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-27215572117 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 27215572117.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27215572147) 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, 11053023 + ... + 11055484.

It is an arithmetic number, because the mean of its divisors is an integer number (6809420464).

Almost surely, 2^27215572117 is an apocalyptic number.

It is an amenable number.

27215572117 is a deficient number, since it is larger than the sum of its proper divisors (22109739).

27215572117 is a wasteful number, since it uses less digits than its factorization.

27215572117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22109738.

The product of its digits is 68600, while the sum is 40.

The spelling of 27215572117 in words is "twenty-seven billion, two hundred fifteen million, five hundred seventy-two thousand, one hundred seventeen".