73406914884521 has 2 divisors, whose sum is σ = 73406914884522. Its totient is φ = 73406914884520.

The previous prime is 73406914884487. The next prime is 73406914884617. The reversal of 73406914884521 is 12548841960437.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50858292250000 + 22548622634521 = 7131500^2 + 4748539^2 .

It is an emirp because it is prime and its reverse (12548841960437) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73406914884521 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (73406914880521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36703457442260 + 36703457442261.

It is an arithmetic number, because the mean of its divisors is an integer number (36703457442261).

It is a 1-persistent number, because it is pandigital, but 2⋅73406914884521 = 146813829769042 is not.

Almost surely, 2^{73406914884521} is an apocalyptic number.

It is an amenable number.

73406914884521 is a deficient number, since it is larger than the sum of its proper divisors (1).

73406914884521 is an equidigital number, since it uses as much as digits as its factorization.

73406914884521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46448640, while the sum is 62.

The spelling of 73406914884521 in words is "seventy-three trillion, four hundred six billion, nine hundred fourteen million, eight hundred eighty-four thousand, five hundred twenty-one".