181730094388 has 6 divisors (see below), whose sum is σ = 318027665186. Its totient is φ = 90865047192.

The previous prime is 181730094383. The next prime is 181730094431. The reversal of 181730094388 is 883490037181.

It can be written as a sum of positive squares in only one way, i.e., 177722951184 + 4007143204 = 421572^2 + 63302^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181730094383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22716261795 + ... + 22716261802.

Almost surely, 2^181730094388 is an apocalyptic number.

It is an amenable number.

181730094388 is a deficient number, since it is larger than the sum of its proper divisors (136297570798).

181730094388 is a wasteful number, since it uses less digits than its factorization.

181730094388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45432523601 (or 45432523599 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 52.

The spelling of 181730094388 in words is "one hundred eighty-one billion, seven hundred thirty million, ninety-four thousand, three hundred eighty-eight".