1727661427073 has 4 divisors (see below), whose sum is σ = 1829288569860. Its totient is φ = 1626034284288.

The previous prime is 1727661427069. The next prime is 1727661427091. The reversal of 1727661427073 is 3707241667271.

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 678618431089 + 1049042995984 = 823783^2 + 1024228^2 .

It is a cyclic number.

It is not a de Polignac number, because 1727661427073 - 2² = 1727661427069 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1727661427873) 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, 50813571368 + ... + 50813571401.

It is an arithmetic number, because the mean of its divisors is an integer number (457322142465).

Almost surely, 2^{1727661427073} is an apocalyptic number.

It is an amenable number.

1727661427073 is a deficient number, since it is larger than the sum of its proper divisors (101627142787).

1727661427073 is a wasteful number, since it uses less digits than its factorization.

1727661427073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101627142786.

The product of its (nonzero) digits is 4148928, while the sum is 53.

The spelling of 1727661427073 in words is "one trillion, seven hundred twenty-seven billion, six hundred sixty-one million, four hundred twenty-seven thousand, seventy-three".