61123405069 has 2 divisors, whose sum is σ = 61123405070. Its totient is φ = 61123405068.

The previous prime is 61123405001. The next prime is 61123405097. The reversal of 61123405069 is 96050432116.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57330076969 + 3793328100 = 239437^2 + 61590^2 .

It is a cyclic number.

It is not a de Polignac number, because 61123405069 - 2⁹ = 61123404557 is a prime.

It is a super-2 number, since 2×61123405069² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61123405169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30561702534 + 30561702535.

It is an arithmetic number, because the mean of its divisors is an integer number (30561702535).

Almost surely, 2^61123405069 is an apocalyptic number.

It is an amenable number.

61123405069 is a deficient number, since it is larger than the sum of its proper divisors (1).

61123405069 is an equidigital number, since it uses as much as digits as its factorization.

61123405069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 37.

The spelling of 61123405069 in words is "sixty-one billion, one hundred twenty-three million, four hundred five thousand, sixty-nine".