694517216985 has 12 divisors (see below), whose sum is σ = 1203829842852. Its totient is φ = 370409182368.

The previous prime is 694517216977. The next prime is 694517216993. The reversal of 694517216985 is 589612715496.

694517216985 is a `hidden beast` number, since 6 + 9 + 4 + 517 + 21 + 6 + 98 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (694517216977) and next prime (694517216993).

It can be written as a sum of positive squares in 2 ways, for example, as 159869626569 + 534647590416 = 399837^2 + 731196^2 .

It is not a de Polignac number, because 694517216985 - 2³ = 694517216977 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7716857922 + ... + 7716858011.

It is an arithmetic number, because the mean of its divisors is an integer number (100319153571).

Almost surely, 2^694517216985 is an apocalyptic number.

It is an amenable number.

694517216985 is a deficient number, since it is larger than the sum of its proper divisors (509312625867).

694517216985 is a wasteful number, since it uses less digits than its factorization.

694517216985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15433715944 (or 15433715941 counting only the distinct ones).

The product of its digits is 32659200, while the sum is 63.

The spelling of 694517216985 in words is "six hundred ninety-four billion, five hundred seventeen million, two hundred sixteen thousand, nine hundred eighty-five".