74564227613 has 2 divisors, whose sum is σ = 74564227614. Its totient is φ = 74564227612.

The previous prime is 74564227603. The next prime is 74564227631. The reversal of 74564227613 is 31672246547.

Together with next prime (74564227631) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49984886329 + 24579341284 = 223573^2 + 156778^2 .

It is an emirp because it is prime and its reverse (31672246547) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74564227613 - 2¹⁰ = 74564226589 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74564227603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37282113806 + 37282113807.

It is an arithmetic number, because the mean of its divisors is an integer number (37282113807).

Almost surely, 2^74564227613 is an apocalyptic number.

It is an amenable number.

74564227613 is a deficient number, since it is larger than the sum of its proper divisors (1).

74564227613 is an equidigital number, since it uses as much as digits as its factorization.

74564227613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1693440, while the sum is 47.

The spelling of 74564227613 in words is "seventy-four billion, five hundred sixty-four million, two hundred twenty-seven thousand, six hundred thirteen".