73224740161 has 4 divisors (see below), whose sum is σ = 73225840324. Its totient is φ = 73223640000.

The previous prime is 73224740159. The next prime is 73224740179. The reversal of 73224740161 is 16104742237.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29090713600 + 44134026561 = 170560^2 + 210081^2 .

It is a cyclic number.

It is not a de Polignac number, because 73224740161 - 2¹ = 73224740159 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 73224740161.

It is not an unprimeable number, because it can be changed into a prime (73224740461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 443340 + ... + 585661.

It is an arithmetic number, because the mean of its divisors is an integer number (18306460081).

Almost surely, 2^73224740161 is an apocalyptic number.

It is an amenable number.

73224740161 is a deficient number, since it is larger than the sum of its proper divisors (1100163).

73224740161 is a wasteful number, since it uses less digits than its factorization.

73224740161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100162.

The product of its (nonzero) digits is 56448, while the sum is 37.

The spelling of 73224740161 in words is "seventy-three billion, two hundred twenty-four million, seven hundred forty thousand, one hundred sixty-one".