3616807161681 has 32 divisors (see below), whose sum is σ = 6215093114880. Its totient is φ = 2035899973008.

The previous prime is 3616807161677. The next prime is 3616807161683. The reversal of 3616807161681 is 1861617086163.

3616807161681 is a `hidden beast` number, since 3 + 6 + 16 + 8 + 0 + 7 + 1 + 616 + 8 + 1 = 666.

It is not a de Polignac number, because 3616807161681 - 2² = 3616807161677 is a prime.

It is a super-2 number, since 2×3616807161681² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3616807161683) 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, 142797381 + ... + 142822706.

It is an arithmetic number, because the mean of its divisors is an integer number (194221659840).

Almost surely, 2^{3616807161681} is an apocalyptic number.

It is an amenable number.

3616807161681 is a deficient number, since it is larger than the sum of its proper divisors (2598285953199).

3616807161681 is a wasteful number, since it uses less digits than its factorization.

3616807161681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285620170 (or 285620164 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 54.

The spelling of 3616807161681 in words is "three trillion, six hundred sixteen billion, eight hundred seven million, one hundred sixty-one thousand, six hundred eighty-one".