73505018501 has 2 divisors, whose sum is σ = 73505018502. Its totient is φ = 73505018500.

The previous prime is 73505018479. The next prime is 73505018563. The reversal of 73505018501 is 10581050537.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58240168900 + 15264849601 = 241330^2 + 123551^2 .

It is an emirp because it is prime and its reverse (10581050537) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 73505018501 - 2¹⁸ = 73504756357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73505018201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36752509250 + 36752509251.

It is an arithmetic number, because the mean of its divisors is an integer number (36752509251).

Almost surely, 2^73505018501 is an apocalyptic number.

It is an amenable number.

73505018501 is a deficient number, since it is larger than the sum of its proper divisors (1).

73505018501 is an equidigital number, since it uses as much as digits as its factorization.

73505018501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21000, while the sum is 35.

The spelling of 73505018501 in words is "seventy-three billion, five hundred five million, eighteen thousand, five hundred one".