42442680647 has 2 divisors, whose sum is σ = 42442680648. Its totient is φ = 42442680646.

The previous prime is 42442680601. The next prime is 42442680659. The reversal of 42442680647 is 74608624424.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42442680647 is a prime.

It is a super-3 number, since 3×42442680647³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42442680667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21221340323 + 21221340324.

It is an arithmetic number, because the mean of its divisors is an integer number (21221340324).

Almost surely, 2^42442680647 is an apocalyptic number.

42442680647 is a deficient number, since it is larger than the sum of its proper divisors (1).

42442680647 is an equidigital number, since it uses as much as digits as its factorization.

42442680647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2064384, while the sum is 47.

The spelling of 42442680647 in words is "forty-two billion, four hundred forty-two million, six hundred eighty thousand, six hundred forty-seven".