39520564807663 has 2 divisors, whose sum is σ = 39520564807664. Its totient is φ = 39520564807662.

The previous prime is 39520564807657. The next prime is 39520564807741. The reversal of 39520564807663 is 36670846502593.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39520564807663 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 39520564807595 and 39520564807604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39520564807643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19760282403831 + 19760282403832.

It is an arithmetic number, because the mean of its divisors is an integer number (19760282403832).

Almost surely, 2^{39520564807663} is an apocalyptic number.

39520564807663 is a deficient number, since it is larger than the sum of its proper divisors (1).

39520564807663 is an equidigital number, since it uses as much as digits as its factorization.

39520564807663 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 195955200, while the sum is 64.

The spelling of 39520564807663 in words is "thirty-nine trillion, five hundred twenty billion, five hundred sixty-four million, eight hundred seven thousand, six hundred sixty-three".