6395985858881 has 2 divisors, whose sum is σ = 6395985858882. Its totient is φ = 6395985858880.

The previous prime is 6395985858859. The next prime is 6395985858929. The reversal of 6395985858881 is 1888585895936.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4003936968256 + 2392048890625 = 2000984^2 + 1546625^2 .

It is a cyclic number.

It is not a de Polignac number, because 6395985858881 - 2⁶ = 6395985858817 is a prime.

It is a super-2 number, since 2×6395985858881² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6395985858881.

It is not a weakly prime, because it can be changed into another prime (6395985858481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3197992929440 + 3197992929441.

It is an arithmetic number, because the mean of its divisors is an integer number (3197992929441).

Almost surely, 2^{6395985858881} is an apocalyptic number.

It is an amenable number.

6395985858881 is a deficient number, since it is larger than the sum of its proper divisors (1).

6395985858881 is an equidigital number, since it uses as much as digits as its factorization.

6395985858881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5971968000, while the sum is 83.

The spelling of 6395985858881 in words is "six trillion, three hundred ninety-five billion, nine hundred eighty-five million, eight hundred fifty-eight thousand, eight hundred eighty-one".