74686268647 has 2 divisors, whose sum is σ = 74686268648. Its totient is φ = 74686268646.

The previous prime is 74686268627. The next prime is 74686268651.

74686268647 is nontrivially palindromic in base 10.

It is a strong prime.

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 74686268647 - 2¹⁵ = 74686235879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74686268627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37343134323 + 37343134324.

It is an arithmetic number, because the mean of its divisors is an integer number (37343134324).

Almost surely, 2^74686268647 is an apocalyptic number.

74686268647 is a deficient number, since it is larger than the sum of its proper divisors (1).

74686268647 is an equidigital number, since it uses as much as digits as its factorization.

74686268647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 130056192, while the sum is 64.

The spelling of 74686268647 in words is "seventy-four billion, six hundred eighty-six million, two hundred sixty-eight thousand, six hundred forty-seven".