75129649009 has 2 divisors, whose sum is σ = 75129649010. Its totient is φ = 75129649008.

The previous prime is 75129648947. The next prime is 75129649013. The reversal of 75129649009 is 90094692157.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49772271409 + 25357377600 = 223097^2 + 159240^2 .

It is a cyclic number.

It is not a de Polignac number, because 75129649009 - 2⁹ = 75129648497 is a prime.

It is not a weakly prime, because it can be changed into another prime (75129649039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37564824504 + 37564824505.

It is an arithmetic number, because the mean of its divisors is an integer number (37564824505).

Almost surely, 2^75129649009 is an apocalyptic number.

It is an amenable number.

75129649009 is a deficient number, since it is larger than the sum of its proper divisors (1).

75129649009 is an equidigital number, since it uses as much as digits as its factorization.

75129649009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1224720, while the sum is 52.

The spelling of 75129649009 in words is "seventy-five billion, one hundred twenty-nine million, six hundred forty-nine thousand, nine".