75926149209 has 27 divisors (see below), whose sum is σ = 111843951037. Its totient is φ = 49633730016.

The previous prime is 75926149063. The next prime is 75926149249. The reversal of 75926149209 is 90294162957.

The square root of 75926149209 is 275547.

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

75926149209 is a `hidden beast` number, since 7 + 5 + 92 + 61 + 492 + 0 + 9 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 2246475609 + 73679673600 = 47397^2 + 271440^2 .

It is not a de Polignac number, because 75926149209 - 2¹¹ = 75926147161 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (75926149249) 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 26 ways as a sum of consecutive naturals, for example, 43811107 + ... + 43812839.

Almost surely, 2^75926149209 is an apocalyptic number.

75926149209 is the 275547-th square number.

75926149209 is the 137774-th centered octagonal number.

It is an amenable number.

75926149209 is a deficient number, since it is larger than the sum of its proper divisors (35917801828).

75926149209 is an frugal number, since it uses more digits than its factorization.

75926149209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3578 (or 1789 counting only the distinct ones).

The product of its (nonzero) digits is 2449440, while the sum is 54.

The spelling of 75926149209 in words is "seventy-five billion, nine hundred twenty-six million, one hundred forty-nine thousand, two hundred nine".