27900542549 has 16 divisors (see below), whose sum is σ = 31015609344. Its totient is φ = 24885561600.

The previous prime is 27900542521. The next prime is 27900542567. The reversal of 27900542549 is 94524500972.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27900542549 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 (27900542249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62417 + ... + 244329.

It is an arithmetic number, because the mean of its divisors is an integer number (1938475584).

Almost surely, 2^27900542549 is an apocalyptic number.

It is an amenable number.

27900542549 is a deficient number, since it is larger than the sum of its proper divisors (3115066795).

27900542549 is a wasteful number, since it uses less digits than its factorization.

27900542549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182188.

The product of its (nonzero) digits is 907200, while the sum is 47.

The spelling of 27900542549 in words is "twenty-seven billion, nine hundred million, five hundred forty-two thousand, five hundred forty-nine".