165574344073 has 2 divisors, whose sum is σ = 165574344074. Its totient is φ = 165574344072.

The previous prime is 165574344043. The next prime is 165574344113. The reversal of 165574344073 is 370443475561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 145685729344 + 19888614729 = 381688^2 + 141027^2 .

It is a cyclic number.

It is not a de Polignac number, because 165574344073 - 2³³ = 156984409481 is a prime.

It is not a weakly prime, because it can be changed into another prime (165574344043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82787172036 + 82787172037.

It is an arithmetic number, because the mean of its divisors is an integer number (82787172037).

Almost surely, 2^165574344073 is an apocalyptic number.

It is an amenable number.

165574344073 is a deficient number, since it is larger than the sum of its proper divisors (1).

165574344073 is an equidigital number, since it uses as much as digits as its factorization.

165574344073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4233600, while the sum is 49.

The spelling of 165574344073 in words is "one hundred sixty-five billion, five hundred seventy-four million, three hundred forty-four thousand, seventy-three".