180148138 has 4 divisors (see below), whose sum is σ = 270222210. Its totient is φ = 90074068.

The previous prime is 180148127. The next prime is 180148147. The reversal of 180148138 is 831841081.

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., 176810209 + 3337929 = 13297^2 + 1827^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45037033 + ... + 45037036.

Almost surely, 2^180148138 is an apocalyptic number.

180148138 is a deficient number, since it is larger than the sum of its proper divisors (90074072).

180148138 is an equidigital number, since it uses as much as digits as its factorization.

180148138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90074071.

The product of its (nonzero) digits is 6144, while the sum is 34.

The square root of 180148138 is about 13421.9275068822. The cubic root of 180148138 is about 564.7764672956.

The spelling of 180148138 in words is "one hundred eighty million, one hundred forty-eight thousand, one hundred thirty-eight".