73637000161 has 2 divisors, whose sum is σ = 73637000162. Its totient is φ = 73637000160.

The previous prime is 73637000111. The next prime is 73637000167. The reversal of 73637000161 is 16100073637.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44962657936 + 28674342225 = 212044^2 + 169335^2 .

It is a cyclic number.

It is not a de Polignac number, because 73637000161 - 2⁹ = 73636999649 is a prime.

It is a super-2 number, since 2×73637000161² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (73637000167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36818500080 + 36818500081.

It is an arithmetic number, because the mean of its divisors is an integer number (36818500081).

Almost surely, 2^73637000161 is an apocalyptic number.

It is an amenable number.

73637000161 is a deficient number, since it is larger than the sum of its proper divisors (1).

73637000161 is an equidigital number, since it uses as much as digits as its factorization.

73637000161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15876, while the sum is 34.

Adding to 73637000161 its reverse (16100073637), we get a palindrome (89737073798).

The spelling of 73637000161 in words is "seventy-three billion, six hundred thirty-seven million, one hundred sixty-one", and thus it is an aban number.