73704196535521 has 2 divisors, whose sum is σ = 73704196535522. Its totient is φ = 73704196535520.

The previous prime is 73704196535491. The next prime is 73704196535561. The reversal of 73704196535521 is 12553569140737.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73092924313600 + 611272221921 = 8549440^2 + 781839^2 .

It is an emirp because it is prime and its reverse (12553569140737) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 73704196535521 - 2³⁷ = 73566757582049 is a prime.

It is not a weakly prime, because it can be changed into another prime (73704196535561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36852098267760 + 36852098267761.

It is an arithmetic number, because the mean of its divisors is an integer number (36852098267761).

Almost surely, 2^{73704196535521} is an apocalyptic number.

It is an amenable number.

73704196535521 is a deficient number, since it is larger than the sum of its proper divisors (1).

73704196535521 is an equidigital number, since it uses as much as digits as its factorization.

73704196535521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23814000, while the sum is 58.

The spelling of 73704196535521 in words is "seventy-three trillion, seven hundred four billion, one hundred ninety-six million, five hundred thirty-five thousand, five hundred twenty-one".