61603384946729 has 2 divisors, whose sum is σ = 61603384946730. Its totient is φ = 61603384946728.

The previous prime is 61603384946669. The next prime is 61603384946771. The reversal of 61603384946729 is 92764948330616.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61569759289600 + 33625657129 = 7846640^2 + 183373^2 .

It is a cyclic number.

It is not a de Polignac number, because 61603384946729 - 2²⁰ = 61603383898153 is a prime.

It is not a weakly prime, because it can be changed into another prime (61603384966729) 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, 30801692473364 + 30801692473365.

It is an arithmetic number, because the mean of its divisors is an integer number (30801692473365).

Almost surely, 2^{61603384946729} is an apocalyptic number.

It is an amenable number.

61603384946729 is a deficient number, since it is larger than the sum of its proper divisors (1).

61603384946729 is an equidigital number, since it uses as much as digits as its factorization.

61603384946729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 282175488, while the sum is 68.

The spelling of 61603384946729 in words is "sixty-one trillion, six hundred three billion, three hundred eighty-four million, nine hundred forty-six thousand, seven hundred twenty-nine".