161606105551512 has 24 divisors (see below), whose sum is σ = 437683202535540. Its totient is φ = 53868701850480.

The previous prime is 161606105551453. The next prime is 161606105551523. The reversal of 161606105551512 is 215155501606161.

161606105551512 is a `hidden beast` number, since 1 + 6 + 1 + 6 + 0 + 610 + 5 + 5 + 5 + 15 + 12 = 666.

161606105551512 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×161606105551512² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1122264621814 + ... + 1122264621957.

Almost surely, 2^{161606105551512} is an apocalyptic number.

161606105551512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161606105551512 is an abundant number, since it is smaller than the sum of its proper divisors (276077096984028).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161606105551512 is a wasteful number, since it uses less digits than its factorization.

161606105551512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2244529243783 (or 2244529243776 counting only the distinct ones).

The product of its (nonzero) digits is 270000, while the sum is 45.

The spelling of 161606105551512 in words is "one hundred sixty-one trillion, six hundred six billion, one hundred five million, five hundred fifty-one thousand, five hundred twelve".