27158602549 has 4 divisors (see below), whose sum is σ = 29247725836. Its totient is φ = 25069479264.

The previous prime is 27158602531. The next prime is 27158602571. The reversal of 27158602549 is 94520685172.

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 1079582449 + 26079020100 = 32857^2 + 161490^2 .

It is a cyclic number.

It is not a de Polignac number, because 27158602549 - 2⁵ = 27158602517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27158602579) 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, 1044561624 + ... + 1044561649.

It is an arithmetic number, because the mean of its divisors is an integer number (7311931459).

Almost surely, 2^27158602549 is an apocalyptic number.

It is an amenable number.

27158602549 is a deficient number, since it is larger than the sum of its proper divisors (2089123287).

27158602549 is a wasteful number, since it uses less digits than its factorization.

27158602549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2089123286.

The product of its (nonzero) digits is 1209600, while the sum is 49.

The spelling of 27158602549 in words is "twenty-seven billion, one hundred fifty-eight million, six hundred two thousand, five hundred forty-nine".