6395994085 has 32 divisors (see below), whose sum is σ = 8510497632. Its totient is φ = 4583900160.

The previous prime is 6395994083. The next prime is 6395994089. The reversal of 6395994085 is 5804995936.

It can be written as a sum of positive squares in 16 ways, for example, as 3102267204 + 3293726881 = 55698^2 + 57391^2 .

It is not a de Polignac number, because 6395994085 - 2¹ = 6395994083 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6395994083) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1009347 + ... + 1015663.

It is an arithmetic number, because the mean of its divisors is an integer number (265953051).

Almost surely, 2^6395994085 is an apocalyptic number.

6395994085 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

6395994085 is a deficient number, since it is larger than the sum of its proper divisors (2114503547).

6395994085 is a wasteful number, since it uses less digits than its factorization.

6395994085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6793.

The product of its (nonzero) digits is 10497600, while the sum is 58.

The square root of 6395994085 is about 79974.9591122121. The cubic root of 6395994085 is about 1856.2480815468.

The spelling of 6395994085 in words is "six billion, three hundred ninety-five million, nine hundred ninety-four thousand, eighty-five".