161817088 has 40 divisors (see below), whose sum is σ = 324663372. Its totient is φ = 80572416.

The previous prime is 161817083. The next prime is 161817113. The reversal of 161817088 is 880718161.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 160985344 + 831744 = 12688^2 + 912^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 161817088.

It is not an unprimeable number, because it can be changed into a prime (161817083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161806 + ... + 162802.

Almost surely, 2^161817088 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 161817088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (162331686).

161817088 is an abundant number, since it is smaller than the sum of its proper divisors (162846284).

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

161817088 is an frugal number, since it uses more digits than its factorization.

161817088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1332 (or 1316 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 40.

The square root of 161817088 is about 12720.7345699845. The cubic root of 161817088 is about 544.9309319650.

It can be divided in two parts, 16 and 1817088, that added together give a square (1817104 = 1348²).

The spelling of 161817088 in words is "one hundred sixty-one million, eight hundred seventeen thousand, eighty-eight".