75149998225 has 27 divisors (see below), whose sum is σ = 94236105873. Its totient is φ = 59450012640.

The previous prime is 75149998207. The next prime is 75149998277. The reversal of 75149998225 is 52289994157.

The square root of 75149998225 is 274135.

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 275526801 + 74874471424 = 16599^2 + 273632^2 .

It is not a de Polignac number, because 75149998225 - 2²⁵ = 75116443793 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 149403324 + ... + 149403826.

Almost surely, 2^75149998225 is an apocalyptic number.

75149998225 is the 274135-th square number.

75149998225 is the 137068-th centered octagonal number.

It is an amenable number.

75149998225 is a deficient number, since it is larger than the sum of its proper divisors (19086107648).

75149998225 is an frugal number, since it uses more digits than its factorization.

75149998225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1234 (or 617 counting only the distinct ones).

The product of its digits is 16329600, while the sum is 61.

The spelling of 75149998225 in words is "seventy-five billion, one hundred forty-nine million, nine hundred ninety-eight thousand, two hundred twenty-five".