6395985858861 has 20 divisors (see below), whose sum is σ = 9554866527712. Its totient is φ = 4263825835368.

The previous prime is 6395985858859. The next prime is 6395985858881. The reversal of 6395985858861 is 1688585895936.

6395985858861 is a `hidden beast` number, since 6 + 395 + 98 + 5 + 8 + 5 + 88 + 61 = 666.

It is not a de Polignac number, because 6395985858861 - 2¹ = 6395985858859 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6395985858881) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 602376 + ... + 3626958.

Almost surely, 2^{6395985858861} is an apocalyptic number.

It is an amenable number.

6395985858861 is a deficient number, since it is larger than the sum of its proper divisors (3158880668851).

6395985858861 is a wasteful number, since it uses less digits than its factorization.

6395985858861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3050702 (or 3050693 counting only the distinct ones).

The product of its digits is 4478976000, while the sum is 81.

The spelling of 6395985858861 in words is "six trillion, three hundred ninety-five billion, nine hundred eighty-five million, eight hundred fifty-eight thousand, eight hundred sixty-one".