73215721323 has 24 divisors (see below), whose sum is σ = 114330866000. Its totient is φ = 44991733824.

The previous prime is 73215721321. The next prime is 73215721333. The reversal of 73215721323 is 32312751237.

73215721323 is a `hidden beast` number, since 7 + 321 + 5 + 7 + 2 + 1 + 323 = 666.

It is not a de Polignac number, because 73215721323 - 2¹ = 73215721321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (73215721321) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5779648 + ... + 5792301.

Almost surely, 2^73215721323 is an apocalyptic number.

73215721323 is a deficient number, since it is larger than the sum of its proper divisors (41115144677).

73215721323 is a wasteful number, since it uses less digits than its factorization.

73215721323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11572011 (or 11572008 counting only the distinct ones).

The product of its digits is 52920, while the sum is 36.

The spelling of 73215721323 in words is "seventy-three billion, two hundred fifteen million, seven hundred twenty-one thousand, three hundred twenty-three".