53720382161 has 2 divisors, whose sum is σ = 53720382162. Its totient is φ = 53720382160.

The previous prime is 53720382113. The next prime is 53720382173. The reversal of 53720382161 is 16128302735.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52029610000 + 1690772161 = 228100^2 + 41119^2 .

It is a cyclic number.

It is not a de Polignac number, because 53720382161 - 2¹⁰ = 53720381137 is a prime.

It is not a weakly prime, because it can be changed into another prime (53720382461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26860191080 + 26860191081.

It is an arithmetic number, because the mean of its divisors is an integer number (26860191081).

Almost surely, 2^53720382161 is an apocalyptic number.

It is an amenable number.

53720382161 is a deficient number, since it is larger than the sum of its proper divisors (1).

53720382161 is an equidigital number, since it uses as much as digits as its factorization.

53720382161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 38.

Adding to 53720382161 its reverse (16128302735), we get a palindrome (69848684896).

The spelling of 53720382161 in words is "fifty-three billion, seven hundred twenty million, three hundred eighty-two thousand, one hundred sixty-one".