74605256535209 has 2 divisors, whose sum is σ = 74605256535210. Its totient is φ = 74605256535208.

The previous prime is 74605256535179. The next prime is 74605256535211. The reversal of 74605256535209 is 90253565250647.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68569744069225 + 6035512465984 = 8280685^2 + 2456728^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74605256535209 is a prime.

Together with 74605256535211, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (74605256535409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37302628267604 + 37302628267605.

It is an arithmetic number, because the mean of its divisors is an integer number (37302628267605).

Almost surely, 2^{74605256535209} is an apocalyptic number.

It is an amenable number.

74605256535209 is a deficient number, since it is larger than the sum of its proper divisors (1).

74605256535209 is an equidigital number, since it uses as much as digits as its factorization.

74605256535209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 68040000, while the sum is 59.

The spelling of 74605256535209 in words is "seventy-four trillion, six hundred five billion, two hundred fifty-six million, five hundred thirty-five thousand, two hundred nine".