161608536 has 24 divisors (see below), whose sum is σ = 437689980. Its totient is φ = 53869488.

The previous prime is 161608519. The next prime is 161608541. The reversal of 161608536 is 635806161.

It is a happy number.

161608536 is a `hidden beast` number, since 1 + 61 + 60 + 8 + 536 = 666.

161608536 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 2×161608536² = 52234637816126592, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 161608536.

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, 1122210 + ... + 1122353.

Almost surely, 2^161608536 is an apocalyptic number.

It is an amenable number.

161608536 is an abundant number, since it is smaller than the sum of its proper divisors (276081444).

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

161608536 is a wasteful number, since it uses less digits than its factorization.

161608536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2244575 (or 2244568 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 161608536 is about 12712.5346017228. The cubic root of 161608536 is about 544.6967265933.

The spelling of 161608536 in words is "one hundred sixty-one million, six hundred eight thousand, five hundred thirty-six".