73885656321 has 12 divisors (see below), whose sum is σ = 107265473172. Its totient is φ = 49007066976.

The previous prime is 73885656301. The next prime is 73885656323. The reversal of 73885656321 is 12365658837.

73885656321 is a `hidden beast` number, since 7 + 3 + 8 + 8 + 56 + 563 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 66274838721 + 7610817600 = 257439^2 + 87240^2 .

It is not a de Polignac number, because 73885656321 - 2¹⁰ = 73885655297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (73885656323) 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 in 11 ways as a sum of consecutive naturals, for example, 20834566 + ... + 20838111.

It is an arithmetic number, because the mean of its divisors is an integer number (8938789431).

Almost surely, 2^73885656321 is an apocalyptic number.

It is an amenable number.

73885656321 is a deficient number, since it is larger than the sum of its proper divisors (33379816851).

73885656321 is a wasteful number, since it uses less digits than its factorization.

73885656321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41672880 (or 41672877 counting only the distinct ones).

The product of its digits is 7257600, while the sum is 54.

The spelling of 73885656321 in words is "seventy-three billion, eight hundred eighty-five million, six hundred fifty-six thousand, three hundred twenty-one".