27740545537 has 4 divisors (see below), whose sum is σ = 27745706196. Its totient is φ = 27735384880.

The previous prime is 27740545513. The next prime is 27740545541. The reversal of 27740545537 is 73554504772.

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 10039839601 + 17700705936 = 100199^2 + 133044^2 .

It is a cyclic number.

It is not a de Polignac number, because 27740545537 - 2²⁷ = 27606327809 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27740545577) 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, 2572258 + ... + 2583019.

It is an arithmetic number, because the mean of its divisors is an integer number (6936426549).

Almost surely, 2^27740545537 is an apocalyptic number.

It is an amenable number.

27740545537 is a deficient number, since it is larger than the sum of its proper divisors (5160659).

27740545537 is an equidigital number, since it uses as much as digits as its factorization.

27740545537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5160658.

The product of its (nonzero) digits is 4116000, while the sum is 49.

The spelling of 27740545537 in words is "twenty-seven billion, seven hundred forty million, five hundred forty-five thousand, five hundred thirty-seven".