27505285335561 has 16 divisors (see below), whose sum is σ = 40007812423680. Its totient is φ = 16669817957520.

The previous prime is 27505285335547. The next prime is 27505285335613. The reversal of 27505285335561 is 16553358250572.

It is a happy number.

It is not a de Polignac number, because 27505285335561 - 2¹⁰ = 27505285334537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27505285335061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11267380 + ... + 13489418.

It is an arithmetic number, because the mean of its divisors is an integer number (2500488276480).

Almost surely, 2^{27505285335561} is an apocalyptic number.

It is an amenable number.

27505285335561 is a deficient number, since it is larger than the sum of its proper divisors (12502527088119).

27505285335561 is a wasteful number, since it uses less digits than its factorization.

27505285335561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2597156.

The product of its (nonzero) digits is 37800000, while the sum is 57.

The spelling of 27505285335561 in words is "twenty-seven trillion, five hundred five billion, two hundred eighty-five million, three hundred thirty-five thousand, five hundred sixty-one".