73169041921 has 4 divisors (see below), whose sum is σ = 73635086932. Its totient is φ = 72702996912.

The previous prime is 73169041873. The next prime is 73169041937. The reversal of 73169041921 is 12914096137.

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 14469443521 + 58699598400 = 120289^2 + 242280^2 .

It is a cyclic number.

It is not a de Polignac number, because 73169041921 - 2¹⁷ = 73168910849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73169041321) 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, 233022270 + ... + 233022583.

It is an arithmetic number, because the mean of its divisors is an integer number (18408771733).

Almost surely, 2^73169041921 is an apocalyptic number.

It is an amenable number.

73169041921 is a deficient number, since it is larger than the sum of its proper divisors (466045011).

73169041921 is a wasteful number, since it uses less digits than its factorization.

73169041921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466045010.

The product of its (nonzero) digits is 81648, while the sum is 43.

The spelling of 73169041921 in words is "seventy-three billion, one hundred sixty-nine million, forty-one thousand, nine hundred twenty-one".