74012320321 has 4 divisors (see below), whose sum is σ = 74483736532. Its totient is φ = 73540904112.

The previous prime is 74012320289. The next prime is 74012320331. The reversal of 74012320321 is 12302321047.

It is a happy number.

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 22331118096 + 51681202225 = 149436^2 + 227335^2 .

It is a cyclic number.

It is not a de Polignac number, because 74012320321 - 2⁵ = 74012320289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74012320331) 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 3 ways as a sum of consecutive naturals, for example, 235707870 + ... + 235708183.

It is an arithmetic number, because the mean of its divisors is an integer number (18620934133).

Almost surely, 2^74012320321 is an apocalyptic number.

It is an amenable number.

74012320321 is a deficient number, since it is larger than the sum of its proper divisors (471416211).

74012320321 is a wasteful number, since it uses less digits than its factorization.

74012320321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471416210.

The product of its (nonzero) digits is 2016, while the sum is 25.

Adding to 74012320321 its reverse (12302321047), we get a palindrome (86314641368).

The spelling of 74012320321 in words is "seventy-four billion, twelve million, three hundred twenty thousand, three hundred twenty-one".