74435554321 has 2 divisors, whose sum is σ = 74435554322. Its totient is φ = 74435554320.

The previous prime is 74435554253. The next prime is 74435554339. The reversal of 74435554321 is 12345553447.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55048890625 + 19386663696 = 234625^2 + 139236^2 .

It is a cyclic number.

It is not a de Polignac number, because 74435554321 - 2¹¹ = 74435552273 is a prime.

It is not a weakly prime, because it can be changed into another prime (74435554621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37217777160 + 37217777161.

It is an arithmetic number, because the mean of its divisors is an integer number (37217777161).

Almost surely, 2^74435554321 is an apocalyptic number.

It is an amenable number.

74435554321 is a deficient number, since it is larger than the sum of its proper divisors (1).

74435554321 is an equidigital number, since it uses as much as digits as its factorization.

74435554321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1008000, while the sum is 43.

The spelling of 74435554321 in words is "seventy-four billion, four hundred thirty-five million, five hundred fifty-four thousand, three hundred twenty-one".