27017447104561 has 3 divisors (see below), whose sum is σ = 27017452302393. Its totient is φ = 27017441906730.

The previous prime is 27017447104513. The next prime is 27017447104603. The reversal of 27017447104561 is 16540174471072.

It is a happy number.

The square root of 27017447104561 is 5197831.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 27017447104561 - 2²¹ = 27017445007409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27017447104961) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2598916 + ... + 7796746.

It is an arithmetic number, because the mean of its divisors is an integer number (9005817434131).

Almost surely, 2^{27017447104561} is an apocalyptic number.

27017447104561 is the 5197831-st square number.

27017447104561 is the 2598916-th centered octagonal number.

It is an amenable number.

27017447104561 is a deficient number, since it is larger than the sum of its proper divisors (5197832).

27017447104561 is an frugal number, since it uses more digits than its factorization.

27017447104561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10395662 (or 5197831 counting only the distinct ones).

The product of its (nonzero) digits is 1317120, while the sum is 49.

The spelling of 27017447104561 in words is "twenty-seven trillion, seventeen billion, four hundred forty-seven million, one hundred four thousand, five hundred sixty-one".