161606000085649 has 12 divisors (see below), whose sum is σ = 187992224240628. Its totient is φ = 138518271007200.

The previous prime is 161606000085583. The next prime is 161606000085671. The reversal of 161606000085649 is 946580000606161.

It can be written as a sum of positive squares in 2 ways, for example, as 147292981690624 + 14313018395025 = 12136432^2 + 3783255^2 .

It is not a de Polignac number, because 161606000085649 - 2⁷ = 161606000085521 is a prime.

It is a super-2 number, since 2×161606000085649² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161606000085596 and 161606000085605.

It is not an unprimeable number, because it can be changed into a prime (161606000085149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7832442 + ... + 19610179.

It is an arithmetic number, because the mean of its divisors is an integer number (15666018686719).

Almost surely, 2^{161606000085649} is an apocalyptic number.

It is an amenable number.

161606000085649 is a deficient number, since it is larger than the sum of its proper divisors (26386224154979).

161606000085649 is a wasteful number, since it uses less digits than its factorization.

161606000085649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27562816 (or 27562809 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 52.

The spelling of 161606000085649 in words is "one hundred sixty-one trillion, six hundred six billion, eighty-five thousand, six hundred forty-nine".