53720382173 has 2 divisors, whose sum is σ = 53720382174. Its totient is φ = 53720382172.

The previous prime is 53720382161. The next prime is 53720382223. The reversal of 53720382173 is 37128302735.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53288490649 + 431891524 = 230843^2 + 20782^2 .

It is a cyclic number.

It is not a de Polignac number, because 53720382173 - 2¹⁸ = 53720120029 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 53720382173.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53720382113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26860191086 + 26860191087.

It is an arithmetic number, because the mean of its divisors is an integer number (26860191087).

Almost surely, 2^53720382173 is an apocalyptic number.

It is an amenable number.

53720382173 is a deficient number, since it is larger than the sum of its proper divisors (1).

53720382173 is an equidigital number, since it uses as much as digits as its factorization.

53720382173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 211680, while the sum is 41.

The spelling of 53720382173 in words is "fifty-three billion, seven hundred twenty million, three hundred eighty-two thousand, one hundred seventy-three".