74511205997 has 2 divisors, whose sum is σ = 74511205998. Its totient is φ = 74511205996.

The previous prime is 74511205981. The next prime is 74511206093. The reversal of 74511205997 is 79950211547.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43389306601 + 31121899396 = 208301^2 + 176414^2 .

It is an emirp because it is prime and its reverse (79950211547) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74511205997 - 2⁴ = 74511205981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74511205957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37255602998 + 37255602999.

It is an arithmetic number, because the mean of its divisors is an integer number (37255602999).

Almost surely, 2^74511205997 is an apocalyptic number.

It is an amenable number.

74511205997 is a deficient number, since it is larger than the sum of its proper divisors (1).

74511205997 is an equidigital number, since it uses as much as digits as its factorization.

74511205997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 793800, while the sum is 50.

The spelling of 74511205997 in words is "seventy-four billion, five hundred eleven million, two hundred five thousand, nine hundred ninety-seven".