42394473672647 has 2 divisors, whose sum is σ = 42394473672648. Its totient is φ = 42394473672646.

The previous prime is 42394473672637. The next prime is 42394473672689. The reversal of 42394473672647 is 74627637449324.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42394473672647 is a prime.

It is a super-2 number, since 2×42394473672647² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42394473672637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21197236836323 + 21197236836324.

It is an arithmetic number, because the mean of its divisors is an integer number (21197236836324).

Almost surely, 2^{42394473672647} is an apocalyptic number.

42394473672647 is a deficient number, since it is larger than the sum of its proper divisors (1).

42394473672647 is an equidigital number, since it uses as much as digits as its factorization.

42394473672647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1024192512, while the sum is 68.

The spelling of 42394473672647 in words is "forty-two trillion, three hundred ninety-four billion, four hundred seventy-three million, six hundred seventy-two thousand, six hundred forty-seven".