161750988 has 108 divisors (see below), whose sum is σ = 496608112. Its totient is φ = 43476480.

The previous prime is 161750959. The next prime is 161750989. The reversal of 161750988 is 889057161.

161750988 is a `hidden beast` number, since 1 + 61 + 7 + 509 + 88 = 666.

161750988 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161750988² = 52326764237952288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161750989) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 71718 + ... + 73938.

Almost surely, 2^161750988 is an apocalyptic number.

161750988 is a gapful number since it is divisible by the number (18) 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 161750988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (248304056).

161750988 is an abundant number, since it is smaller than the sum of its proper divisors (334857124).

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

161750988 is a wasteful number, since it uses less digits than its factorization.

161750988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2272 (or 2250 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 45.

The square root of 161750988 is about 12718.1361842056. The cubic root of 161750988 is about 544.8567229910.

The spelling of 161750988 in words is "one hundred sixty-one million, seven hundred fifty thousand, nine hundred eighty-eight".