161500672 has 40 divisors (see below), whose sum is σ = 328039272. Its totient is φ = 79411200.

The previous prime is 161500657. The next prime is 161500711. The reversal of 161500672 is 276005161.

It is a self number, because there is not a number n which added to its sum of digits gives 161500672.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28647 + ... + 33817.

Almost surely, 2^161500672 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 161500672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (164019636).

161500672 is an abundant number, since it is smaller than the sum of its proper divisors (166538600).

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

161500672 is an frugal number, since it uses more digits than its factorization.

161500672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5250 (or 5234 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 161500672 is about 12708.2914665977. The cubic root of 161500672 is about 544.5755154960.

The spelling of 161500672 in words is "one hundred sixty-one million, five hundred thousand, six hundred seventy-two".