73553071729 has 2 divisors, whose sum is σ = 73553071730. Its totient is φ = 73553071728.

The previous prime is 73553071703. The next prime is 73553071741. The reversal of 73553071729 is 92717035537.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38514847504 + 35038224225 = 196252^2 + 187185^2 .

It is a cyclic number.

It is not a de Polignac number, because 73553071729 - 2⁷ = 73553071601 is a prime.

It is not a weakly prime, because it can be changed into another prime (73553081729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36776535864 + 36776535865.

It is an arithmetic number, because the mean of its divisors is an integer number (36776535865).

Almost surely, 2^73553071729 is an apocalyptic number.

It is an amenable number.

73553071729 is a deficient number, since it is larger than the sum of its proper divisors (1).

73553071729 is an equidigital number, since it uses as much as digits as its factorization.

73553071729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1389150, while the sum is 49.

The spelling of 73553071729 in words is "seventy-three billion, five hundred fifty-three million, seventy-one thousand, seven hundred twenty-nine".