61644122361169 has 2 divisors, whose sum is σ = 61644122361170. Its totient is φ = 61644122361168.

The previous prime is 61644122361121. The next prime is 61644122361197. The reversal of 61644122361169 is 96116322144616.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46536791516944 + 15107330844225 = 6821788^2 + 3886815^2 .

It is a cyclic number.

It is not a de Polignac number, because 61644122361169 - 2¹³ = 61644122352977 is a prime.

It is a super-2 number, since 2×61644122361169² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (61644122661169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30822061180584 + 30822061180585.

It is an arithmetic number, because the mean of its divisors is an integer number (30822061180585).

Almost surely, 2^{61644122361169} is an apocalyptic number.

It is an amenable number.

61644122361169 is a deficient number, since it is larger than the sum of its proper divisors (1).

61644122361169 is an equidigital number, since it uses as much as digits as its factorization.

61644122361169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2239488, while the sum is 52.

The spelling of 61644122361169 in words is "sixty-one trillion, six hundred forty-four billion, one hundred twenty-two million, three hundred sixty-one thousand, one hundred sixty-nine".