181668482 has 4 divisors (see below), whose sum is σ = 272502726. Its totient is φ = 90834240.

The previous prime is 181668449. The next prime is 181668517. The reversal of 181668482 is 284866181.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 94264681 + 87403801 = 9709^2 + 9349^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45417119 + ... + 45417122.

Almost surely, 2^181668482 is an apocalyptic number.

181668482 is a deficient number, since it is larger than the sum of its proper divisors (90834244).

181668482 is an equidigital number, since it uses as much as digits as its factorization.

181668482 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90834243.

The product of its digits is 147456, while the sum is 44.

The square root of 181668482 is about 13478.4450883624. The cubic root of 181668482 is about 566.3608120324.

The spelling of 181668482 in words is "one hundred eighty-one million, six hundred sixty-eight thousand, four hundred eighty-two".