73502260721 has 2 divisors, whose sum is σ = 73502260722. Its totient is φ = 73502260720.

The previous prime is 73502260693. The next prime is 73502260757. The reversal of 73502260721 is 12706220537.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54316963600 + 19185297121 = 233060^2 + 138511^2 .

It is a cyclic number.

It is not a de Polignac number, because 73502260721 - 2¹⁴ = 73502244337 is a prime.

It is not a weakly prime, because it can be changed into another prime (73502260621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36751130360 + 36751130361.

It is an arithmetic number, because the mean of its divisors is an integer number (36751130361).

Almost surely, 2^73502260721 is an apocalyptic number.

It is an amenable number.

73502260721 is a deficient number, since it is larger than the sum of its proper divisors (1).

73502260721 is an equidigital number, since it uses as much as digits as its factorization.

73502260721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35280, while the sum is 35.

The spelling of 73502260721 in words is "seventy-three billion, five hundred two million, two hundred sixty thousand, seven hundred twenty-one".