42065663633639 has 2 divisors, whose sum is σ = 42065663633640. Its totient is φ = 42065663633638.

The previous prime is 42065663633627. The next prime is 42065663633683. The reversal of 42065663633639 is 93633636656024.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42065663633639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42065663933639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21032831816819 + 21032831816820.

It is an arithmetic number, because the mean of its divisors is an integer number (21032831816820).

Almost surely, 2^{42065663633639} is an apocalyptic number.

42065663633639 is a deficient number, since it is larger than the sum of its proper divisors (1).

42065663633639 is an equidigital number, since it uses as much as digits as its factorization.

42065663633639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 226748160, while the sum is 62.

The spelling of 42065663633639 in words is "forty-two trillion, sixty-five billion, six hundred sixty-three million, six hundred thirty-three thousand, six hundred thirty-nine".