74453125321 has 15 divisors (see below), whose sum is σ = 77912222531. Its totient is φ = 71144685696.

The previous prime is 74453125309. The next prime is 74453125337. The reversal of 74453125321 is 12352135447.

The square root of 74453125321 is 272861.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 7 ways, for example, as 42989460921 + 31463664400 = 207339^2 + 177380^2 .

It is not a de Polignac number, because 74453125321 - 2⁷ = 74453125193 is a prime.

It is a Duffinian number.

Its product of digits (100800) is a multiple of the sum of its prime divisors (126).

It is not an unprimeable number, because it can be changed into a prime (74453125391) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 767557945 + ... + 767558041.

Almost surely, 2^74453125321 is an apocalyptic number.

74453125321 is the 272861-st square number.

74453125321 is the 136431-st centered octagonal number.

It is an amenable number.

74453125321 is a deficient number, since it is larger than the sum of its proper divisors (3459097210).

74453125321 is an frugal number, since it uses more digits than its factorization.

74453125321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446 (or 126 counting only the distinct ones).

The product of its digits is 100800, while the sum is 37.

The spelling of 74453125321 in words is "seventy-four billion, four hundred fifty-three million, one hundred twenty-five thousand, three hundred twenty-one".