27747536641 has 4 divisors (see below), whose sum is σ = 30270039984. Its totient is φ = 25225033300.

The previous prime is 27747536633. The next prime is 27747536657. The reversal of 27747536641 is 14663574772.

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 not a de Polignac number, because 27747536641 - 2³ = 27747536633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27747536611) 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, 1261251655 + ... + 1261251676.

It is an arithmetic number, because the mean of its divisors is an integer number (7567509996).

Almost surely, 2^27747536641 is an apocalyptic number.

It is an amenable number.

27747536641 is a deficient number, since it is larger than the sum of its proper divisors (2522503343).

27747536641 is a wasteful number, since it uses less digits than its factorization.

27747536641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2522503342.

The product of its digits is 5927040, while the sum is 52.

The spelling of 27747536641 in words is "twenty-seven billion, seven hundred forty-seven million, five hundred thirty-six thousand, six hundred forty-one".