61012017173 has 2 divisors, whose sum is σ = 61012017174. Its totient is φ = 61012017172.

The previous prime is 61012017163. The next prime is 61012017239. The reversal of 61012017173 is 37171021016.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57680187889 + 3331829284 = 240167^2 + 57722^2 .

It is a cyclic number.

It is not a de Polignac number, because 61012017173 - 2⁶ = 61012017109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61012017133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30506008586 + 30506008587.

It is an arithmetic number, because the mean of its divisors is an integer number (30506008587).

Almost surely, 2^61012017173 is an apocalyptic number.

It is an amenable number.

61012017173 is a deficient number, since it is larger than the sum of its proper divisors (1).

61012017173 is an equidigital number, since it uses as much as digits as its factorization.

61012017173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1764, while the sum is 29.

Adding to 61012017173 its reverse (37171021016), we get a palindrome (98183038189).

The spelling of 61012017173 in words is "sixty-one billion, twelve million, seventeen thousand, one hundred seventy-three".