27101220617 has 4 divisors (see below), whose sum is σ = 27369549636. Its totient is φ = 26832891600.

The previous prime is 27101220607. The next prime is 27101220649. The reversal of 27101220617 is 71602210172.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11947364416 + 15153856201 = 109304^2 + 123101^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27101220617 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 27101220617.

It is not an unprimeable number, because it can be changed into a prime (27101220607) 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, 134164358 + ... + 134164559.

It is an arithmetic number, because the mean of its divisors is an integer number (6842387409).

Almost surely, 2^27101220617 is an apocalyptic number.

It is an amenable number.

27101220617 is a deficient number, since it is larger than the sum of its proper divisors (268329019).

27101220617 is a wasteful number, since it uses less digits than its factorization.

27101220617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268329018.

The product of its (nonzero) digits is 2352, while the sum is 29.

Adding to 27101220617 its reverse (71602210172), we get a palindrome (98703430789).

The spelling of 27101220617 in words is "twenty-seven billion, one hundred one million, two hundred twenty thousand, six hundred seventeen".