180912091090 has 8 divisors (see below), whose sum is σ = 325641763980. Its totient is φ = 72364836432.

The previous prime is 180912091081. The next prime is 180912091097. The reversal of 180912091090 is 90190219081.

It can be written as a sum of positive squares in 2 ways, for example, as 163134402201 + 17777688889 = 403899^2 + 133333^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (180912091097) 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, 9045604545 + ... + 9045604564.

Almost surely, 2^180912091090 is an apocalyptic number.

180912091090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

180912091090 is a deficient number, since it is larger than the sum of its proper divisors (144729672890).

180912091090 is a wasteful number, since it uses less digits than its factorization.

180912091090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18091209116.

The product of its (nonzero) digits is 11664, while the sum is 40.

The spelling of 180912091090 in words is "one hundred eighty billion, nine hundred twelve million, ninety-one thousand, ninety".