161628156 has 48 divisors (see below), whose sum is σ = 420446880. Its totient is φ = 53694720.

The previous prime is 161628149. The next prime is 161628161. The reversal of 161628156 is 651826161.

161628156 is a `hidden beast` number, since 1 + 616 + 28 + 15 + 6 = 666.

It is a super-2 number, since 2×161628156² = 52247321623920672, 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 161628156.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31876 + ... + 36596.

It is an arithmetic number, because the mean of its divisors is an integer number (8759310).

Almost surely, 2^161628156 is an apocalyptic number.

It is an amenable number.

161628156 is an abundant number, since it is smaller than the sum of its proper divisors (258818724).

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

161628156 is a wasteful number, since it uses less digits than its factorization.

161628156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5051 (or 5043 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 161628156 is about 12713.3062576184. The cubic root of 161628156 is about 544.7187685753.

The spelling of 161628156 in words is "one hundred sixty-one million, six hundred twenty-eight thousand, one hundred fifty-six".