161472636 has 96 divisors (see below), whose sum is σ = 460615680. Its totient is φ = 48606912.

The previous prime is 161472617. The next prime is 161472643. The reversal of 161472636 is 636274161.

It is a happy number.

161472636 is a `hidden beast` number, since 1 + 6 + 14 + 7 + 2 + 636 = 666.

161472636 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 161472636.

It is a congruent number.

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, 64765 + ... + 67211.

It is an arithmetic number, because the mean of its divisors is an integer number (4798080).

Almost surely, 2^161472636 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 161472636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (230307840).

161472636 is an abundant number, since it is smaller than the sum of its proper divisors (299143044).

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

161472636 is a wasteful number, since it uses less digits than its factorization.

161472636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2520 (or 2512 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 161472636 is about 12707.1883593500. The cubic root of 161472636 is about 544.5440014832.

The spelling of 161472636 in words is "one hundred sixty-one million, four hundred seventy-two thousand, six hundred thirty-six".