74728423225 has 9 divisors (see below), whose sum is σ = 92664939693. Its totient is φ = 59781645120.

The previous prime is 74728423163. The next prime is 74728423241. The reversal of 74728423225 is 52232482747.

The square root of 74728423225 is 273365.

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

It can be written as a sum of positive squares in 4 ways, for example, as 20832014889 + 53896408336 = 144333^2 + 232156^2 .

It is not a de Polignac number, because 74728423225 - 2¹³ = 74728415033 is a prime.

It is a super-5 number, since 5×74728423225⁵ (a number of 56 digits) contains 55555 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1339489 + ... + 1394161.

Almost surely, 2^74728423225 is an apocalyptic number.

74728423225 is the 273365-th square number.

74728423225 is the 136683-rd centered octagonal number.

It is an amenable number.

74728423225 is a deficient number, since it is larger than the sum of its proper divisors (17936516468).

74728423225 is an frugal number, since it uses more digits than its factorization.

74728423225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109356 (or 54678 counting only the distinct ones).

The product of its digits is 1505280, while the sum is 46.

The spelling of 74728423225 in words is "seventy-four billion, seven hundred twenty-eight million, four hundred twenty-three thousand, two hundred twenty-five".