61841974169 has 2 divisors, whose sum is σ = 61841974170. Its totient is φ = 61841974168.

The previous prime is 61841974151. The next prime is 61841974177. The reversal of 61841974169 is 96147914816.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61566015625 + 275958544 = 248125^2 + 16612^2 .

It is a cyclic number.

It is not a de Polignac number, because 61841974169 - 2³² = 57547006873 is a prime.

It is a super-4 number, since 4×61841974169⁴ (a number of 44 digits) contains 4444 as substring. Note that it is a super-d number also for d = 3, 2.

It is not a weakly prime, because it can be changed into another prime (61841974199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30920987084 + 30920987085.

It is an arithmetic number, because the mean of its divisors is an integer number (30920987085).

Almost surely, 2^61841974169 is an apocalyptic number.

It is an amenable number.

61841974169 is a deficient number, since it is larger than the sum of its proper divisors (1).

61841974169 is an equidigital number, since it uses as much as digits as its factorization.

61841974169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2612736, while the sum is 56.

The spelling of 61841974169 in words is "sixty-one billion, eight hundred forty-one million, nine hundred seventy-four thousand, one hundred sixty-nine".