161606605556650 has 24 divisors (see below), whose sum is σ = 300588625587744. Its totient is φ = 64642569265200.

The previous prime is 161606605556647. The next prime is 161606605556681. The reversal of 161606605556650 is 56655506606161.

It is a super-2 number, since 2×161606605556650² (a number of 29 digits) contains 22 as substring.

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, 74751385 + ... + 76882915.

It is an arithmetic number, because the mean of its divisors is an integer number (12524526066156).

Almost surely, 2^{161606605556650} is an apocalyptic number.

161606605556650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161606605556650 is a deficient number, since it is larger than the sum of its proper divisors (138982020031094).

161606605556650 is a wasteful number, since it uses less digits than its factorization.

161606605556650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3647886 (or 3647881 counting only the distinct ones).

The product of its (nonzero) digits is 29160000, while the sum is 58.

The spelling of 161606605556650 in words is "one hundred sixty-one trillion, six hundred six billion, six hundred five million, five hundred fifty-six thousand, six hundred fifty".