161654856 has 128 divisors (see below), whose sum is σ = 467251200. Its totient is φ = 46126080.

The previous prime is 161654789. The next prime is 161654861. The reversal of 161654856 is 658456161.

It is a super-2 number, since 2×161654856² = 52264584936761472, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 479520 + ... + 479856.

It is an arithmetic number, because the mean of its divisors is an integer number (3650400).

Almost surely, 2^161654856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161654856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (233625600).

161654856 is an abundant number, since it is smaller than the sum of its proper divisors (305596344).

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

161654856 is a wasteful number, since it uses less digits than its factorization.

161654856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459 (or 455 counting only the distinct ones).

The product of its digits is 172800, while the sum is 42.

The square root of 161654856 is about 12714.3562951492. The cubic root of 161654856 is about 544.7487616795.

The spelling of 161654856 in words is "one hundred sixty-one million, six hundred fifty-four thousand, eight hundred fifty-six".