27752780255549 has 4 divisors (see below), whose sum is σ = 27784938750336. Its totient is φ = 27720621760764.

The previous prime is 27752780255527. The next prime is 27752780255573. The reversal of 27752780255549 is 94555208725772.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27752780255549 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 (27752780255509) 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, 16079246099 + ... + 16079247824.

It is an arithmetic number, because the mean of its divisors is an integer number (6946234687584).

Almost surely, 2^{27752780255549} is an apocalyptic number.

It is an amenable number.

27752780255549 is a deficient number, since it is larger than the sum of its proper divisors (32158494787).

27752780255549 is an equidigital number, since it uses as much as digits as its factorization.

27752780255549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32158494786.

The product of its (nonzero) digits is 493920000, while the sum is 68.

The spelling of 27752780255549 in words is "twenty-seven trillion, seven hundred fifty-two billion, seven hundred eighty million, two hundred fifty-five thousand, five hundred forty-nine".