73770362161 has 2 divisors, whose sum is σ = 73770362162. Its totient is φ = 73770362160.

The previous prime is 73770362153. The next prime is 73770362191. The reversal of 73770362161 is 16126307737.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39330425761 + 34439936400 = 198319^2 + 185580^2 .

It is a cyclic number.

It is not a de Polignac number, because 73770362161 - 2³ = 73770362153 is a prime.

It is not a weakly prime, because it can be changed into another prime (73770362101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36885181080 + 36885181081.

It is an arithmetic number, because the mean of its divisors is an integer number (36885181081).

Almost surely, 2^73770362161 is an apocalyptic number.

It is an amenable number.

73770362161 is a deficient number, since it is larger than the sum of its proper divisors (1).

73770362161 is an equidigital number, since it uses as much as digits as its factorization.

73770362161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 222264, while the sum is 43.

Adding to 73770362161 its reverse (16126307737), we get a palindrome (89896669898).

The spelling of 73770362161 in words is "seventy-three billion, seven hundred seventy million, three hundred sixty-two thousand, one hundred sixty-one".