3385936857681 has 20 divisors (see below), whose sum is σ = 5780576505792. Its totient is φ = 1934821061208.

The previous prime is 3385936857629. The next prime is 3385936857731. The reversal of 3385936857681 is 1867586395833.

3385936857681 is a `hidden beast` number, since 3 + 385 + 93 + 6 + 85 + 7 + 6 + 81 = 666.

It is not a de Polignac number, because 3385936857681 - 2²⁶ = 3385869748817 is a prime.

It is a super-2 number, since 2×3385936857681² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3385936857601) 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, 2985834405 + ... + 2985835538.

Almost surely, 2^{3385936857681} is an apocalyptic number.

It is an amenable number.

3385936857681 is a deficient number, since it is larger than the sum of its proper divisors (2394639648111).

3385936857681 is an equidigital number, since it uses as much as digits as its factorization.

3385936857681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5971669962 (or 5971669953 counting only the distinct ones).

The product of its digits is 783820800, while the sum is 72.

The spelling of 3385936857681 in words is "three trillion, three hundred eighty-five billion, nine hundred thirty-six million, eight hundred fifty-seven thousand, six hundred eighty-one".