75250414721 has 2 divisors, whose sum is σ = 75250414722. Its totient is φ = 75250414720.

The previous prime is 75250414633. The next prime is 75250414747. The reversal of 75250414721 is 12741405257.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48428164096 + 26822250625 = 220064^2 + 163775^2 .

It is a cyclic number.

It is not a de Polignac number, because 75250414721 - 2³⁴ = 58070545537 is a prime.

It is not a weakly prime, because it can be changed into another prime (75250414751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37625207360 + 37625207361.

It is an arithmetic number, because the mean of its divisors is an integer number (37625207361).

Almost surely, 2^75250414721 is an apocalyptic number.

It is an amenable number.

75250414721 is a deficient number, since it is larger than the sum of its proper divisors (1).

75250414721 is an equidigital number, since it uses as much as digits as its factorization.

75250414721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 78400, while the sum is 38.

Adding to 75250414721 its reverse (12741405257), we get a palindrome (87991819978).

The spelling of 75250414721 in words is "seventy-five billion, two hundred fifty million, four hundred fourteen thousand, seven hundred twenty-one".