73645763012473 has 2 divisors, whose sum is σ = 73645763012474. Its totient is φ = 73645763012472.

The previous prime is 73645763012453. The next prime is 73645763012587. The reversal of 73645763012473 is 37421036754637.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42632581185769 + 31013181826704 = 6529363^2 + 5568948^2 .

It is a cyclic number.

It is not a de Polignac number, because 73645763012473 - 2²⁹ = 73645226141561 is a prime.

It is not a weakly prime, because it can be changed into another prime (73645763012443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36822881506236 + 36822881506237.

It is an arithmetic number, because the mean of its divisors is an integer number (36822881506237).

Almost surely, 2^{73645763012473} is an apocalyptic number.

It is an amenable number.

73645763012473 is a deficient number, since it is larger than the sum of its proper divisors (1).

73645763012473 is an equidigital number, since it uses as much as digits as its factorization.

73645763012473 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 53343360, while the sum is 58.

The spelling of 73645763012473 in words is "seventy-three trillion, six hundred forty-five billion, seven hundred sixty-three million, twelve thousand, four hundred seventy-three".