161140932 has 18 divisors (see below), whose sum is σ = 407328558. Its totient is φ = 53713632.

The previous prime is 161140891. The next prime is 161140933. The reversal of 161140932 is 239041161.

161140932 is a `hidden beast` number, since 1 + 611 + 40 + 9 + 3 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 152176896 + 8964036 = 12336^2 + 2994^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 161140896 and 161140905.

It is not an unprimeable number, because it can be changed into a prime (161140933) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2238033 + ... + 2238104.

Almost surely, 2^161140932 is an apocalyptic number.

161140932 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161140932 is an abundant number, since it is smaller than the sum of its proper divisors (246187626).

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

161140932 is a wasteful number, since it uses less digits than its factorization.

161140932 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4476147 (or 4476142 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 161140932 is about 12694.1298244504. The cubic root of 161140932 is about 544.1708706678.

The spelling of 161140932 in words is "one hundred sixty-one million, one hundred forty thousand, nine hundred thirty-two".