74975617217 has 2 divisors, whose sum is σ = 74975617218. Its totient is φ = 74975617216.

The previous prime is 74975617193. The next prime is 74975617229. The reversal of 74975617217 is 71271657947.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66586705936 + 8388911281 = 258044^2 + 91591^2 .

It is a cyclic number.

It is not a de Polignac number, because 74975617217 - 2⁶ = 74975617153 is a prime.

It is not a weakly prime, because it can be changed into another prime (74975617267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37487808608 + 37487808609.

It is an arithmetic number, because the mean of its divisors is an integer number (37487808609).

Almost surely, 2^74975617217 is an apocalyptic number.

It is an amenable number.

74975617217 is a deficient number, since it is larger than the sum of its proper divisors (1).

74975617217 is an equidigital number, since it uses as much as digits as its factorization.

74975617217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5186160, while the sum is 56.

The spelling of 74975617217 in words is "seventy-four billion, nine hundred seventy-five million, six hundred seventeen thousand, two hundred seventeen".