53644664537173 has 2 divisors, whose sum is σ = 53644664537174. Its totient is φ = 53644664537172.

The previous prime is 53644664537099. The next prime is 53644664537257. The reversal of 53644664537173 is 37173546644635.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30133095167044 + 23511569370129 = 5489362^2 + 4848873^2 .

It is a cyclic number.

It is not a de Polignac number, because 53644664537173 - 2¹⁷ = 53644664406101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53644664537273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26822332268586 + 26822332268587.

It is an arithmetic number, because the mean of its divisors is an integer number (26822332268587).

Almost surely, 2^{53644664537173} is an apocalyptic number.

It is an amenable number.

53644664537173 is a deficient number, since it is larger than the sum of its proper divisors (1).

53644664537173 is an equidigital number, since it uses as much as digits as its factorization.

53644664537173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 457228800, while the sum is 64.

The spelling of 53644664537173 in words is "fifty-three trillion, six hundred forty-four billion, six hundred sixty-four million, five hundred thirty-seven thousand, one hundred seventy-three".