61173120629 has 2 divisors, whose sum is σ = 61173120630. Its totient is φ = 61173120628.

The previous prime is 61173120587. The next prime is 61173120661. The reversal of 61173120629 is 92602137116.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45648459025 + 15524661604 = 213655^2 + 124598^2 .

It is a cyclic number.

It is not a de Polignac number, because 61173120629 - 2¹² = 61173116533 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61173120592 and 61173120601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61173120529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30586560314 + 30586560315.

It is an arithmetic number, because the mean of its divisors is an integer number (30586560315).

Almost surely, 2^61173120629 is an apocalyptic number.

It is an amenable number.

61173120629 is a deficient number, since it is larger than the sum of its proper divisors (1).

61173120629 is an equidigital number, since it uses as much as digits as its factorization.

61173120629 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 38.

The spelling of 61173120629 in words is "sixty-one billion, one hundred seventy-three million, one hundred twenty thousand, six hundred twenty-nine".