27747525073 has 4 divisors (see below), whose sum is σ = 28081832688. Its totient is φ = 27413217460.

The previous prime is 27747525049. The next prime is 27747525079. The reversal of 27747525073 is 37052574772.

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-27747525073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27747525079) 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, 167153683 + ... + 167153848.

It is an arithmetic number, because the mean of its divisors is an integer number (7020458172).

Almost surely, 2^27747525073 is an apocalyptic number.

It is an amenable number.

27747525073 is a deficient number, since it is larger than the sum of its proper divisors (334307615).

27747525073 is an equidigital number, since it uses as much as digits as its factorization.

27747525073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334307614.

The product of its (nonzero) digits is 2881200, while the sum is 49.

The spelling of 27747525073 in words is "twenty-seven billion, seven hundred forty-seven million, five hundred twenty-five thousand, seventy-three".