42625646617 has 2 divisors, whose sum is σ = 42625646618. Its totient is φ = 42625646616.

The previous prime is 42625646593. The next prime is 42625646621. The reversal of 42625646617 is 71664652624.

42625646617 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42443828361 + 181818256 = 206019^2 + 13484^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42625646617 is a prime.

It is not a weakly prime, because it can be changed into another prime (42625646417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21312823308 + 21312823309.

It is an arithmetic number, because the mean of its divisors is an integer number (21312823309).

Almost surely, 2^42625646617 is an apocalyptic number.

It is an amenable number.

42625646617 is a deficient number, since it is larger than the sum of its proper divisors (1).

42625646617 is an equidigital number, since it uses as much as digits as its factorization.

42625646617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2903040, while the sum is 49.

The spelling of 42625646617 in words is "forty-two billion, six hundred twenty-five million, six hundred forty-six thousand, six hundred seventeen".