161606000085650 has 12 divisors (see below), whose sum is σ = 300587160159402. Its totient is φ = 64642400034240.

The previous prime is 161606000085583. The next prime is 161606000085671. The reversal of 161606000085650 is 56580000606161.

It can be written as a sum of positive squares in 3 ways, for example, as 87519336701329 + 74086663384321 = 9355177^2 + 8607361^2 .

It is a super-2 number, since 2×161606000085650² (a number of 29 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 1616060000807 + ... + 1616060000906.

Almost surely, 2^{161606000085650} is an apocalyptic number.

161606000085650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161606000085650 is a deficient number, since it is larger than the sum of its proper divisors (138981160073752).

161606000085650 is a wasteful number, since it uses less digits than its factorization.

161606000085650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3232120001725 (or 3232120001720 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 44.

The spelling of 161606000085650 in words is "one hundred sixty-one trillion, six hundred six billion, eighty-five thousand, six hundred fifty".