161159544 has 192 divisors, whose sum is σ = 557706240. Its totient is φ = 42456960.

The previous prime is 161159543. The next prime is 161159549. The reversal of 161159544 is 445951161.

161159544 is a `hidden beast` number, since 1 + 61 + 1 + 59 + 544 = 666.

161159544 is digitally balanced in base 2, 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 junction number, because it is equal to n+sod(n) for n = 161159499 and 161159508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161159543) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 176449 + ... + 177359.

It is an arithmetic number, because the mean of its divisors is an integer number (2904720).

Almost surely, 2^161159544 is an apocalyptic number.

161159544 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161159544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (278853120).

161159544 is an abundant number, since it is smaller than the sum of its proper divisors (396546696).

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

161159544 is a wasteful number, since it uses less digits than its factorization.

161159544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 952 (or 936 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 161159544 is about 12694.8628980387. The cubic root of 161159544 is about 544.1918206901.

The spelling of 161159544 in words is "one hundred sixty-one million, one hundred fifty-nine thousand, five hundred forty-four".