42685365641 has 2 divisors, whose sum is σ = 42685365642. Its totient is φ = 42685365640.

The previous prime is 42685365601. The next prime is 42685365659. The reversal of 42685365641 is 14656358624.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25130175625 + 17555190016 = 158525^2 + 132496^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42685365641 is a prime.

It is a super-3 number, since 3×42685365641³ (a number of 33 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 42685365641.

It is not a weakly prime, because it can be changed into another prime (42685365601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21342682820 + 21342682821.

It is an arithmetic number, because the mean of its divisors is an integer number (21342682821).

Almost surely, 2^42685365641 is an apocalyptic number.

It is an amenable number.

42685365641 is a deficient number, since it is larger than the sum of its proper divisors (1).

42685365641 is an equidigital number, since it uses as much as digits as its factorization.

42685365641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4147200, while the sum is 50.

The spelling of 42685365641 in words is "forty-two billion, six hundred eighty-five million, three hundred sixty-five thousand, six hundred forty-one".