73536033581 has 2 divisors, whose sum is σ = 73536033582. Its totient is φ = 73536033580.

The previous prime is 73536033577. The next prime is 73536033589. The reversal of 73536033581 is 18533063537.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60729716356 + 12806317225 = 246434^2 + 113165^2 .

It is a cyclic number.

It is not a de Polignac number, because 73536033581 - 2² = 73536033577 is a prime.

It is a super-2 number, since 2×73536033581² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73536033589) 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, 36768016790 + 36768016791.

It is an arithmetic number, because the mean of its divisors is an integer number (36768016791).

Almost surely, 2^73536033581 is an apocalyptic number.

It is an amenable number.

73536033581 is a deficient number, since it is larger than the sum of its proper divisors (1).

73536033581 is an equidigital number, since it uses as much as digits as its factorization.

73536033581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 680400, while the sum is 44.

The spelling of 73536033581 in words is "seventy-three billion, five hundred thirty-six million, thirty-three thousand, five hundred eighty-one".