73661130817 has 2 divisors, whose sum is σ = 73661130818. Its totient is φ = 73661130816.

The previous prime is 73661130787. The next prime is 73661130847. The reversal of 73661130817 is 71803116637.

It is a balanced prime because it is at equal distance from previous prime (73661130787) and next prime (73661130847).

It can be written as a sum of positive squares in only one way, i.e., 68414156721 + 5246974096 = 261561^2 + 72436^2 .

It is a cyclic number.

It is not a de Polignac number, because 73661130817 - 2⁷ = 73661130689 is a prime.

It is not a weakly prime, because it can be changed into another prime (73661130847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36830565408 + 36830565409.

It is an arithmetic number, because the mean of its divisors is an integer number (36830565409).

Almost surely, 2^73661130817 is an apocalyptic number.

It is an amenable number.

73661130817 is a deficient number, since it is larger than the sum of its proper divisors (1).

73661130817 is an equidigital number, since it uses as much as digits as its factorization.

73661130817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 127008, while the sum is 43.

The spelling of 73661130817 in words is "seventy-three billion, six hundred sixty-one million, one hundred thirty thousand, eight hundred seventeen".