180256138 has 8 divisors (see below), whose sum is σ = 270670788. Its totient is φ = 90032544.

The previous prime is 180256133. The next prime is 180256147. The reversal of 180256138 is 831652081.

It can be written as a sum of positive squares in 2 ways, for example, as 165302449 + 14953689 = 12857^2 + 3867^2 .

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 (180256133) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 45381 + ... + 49192.

Almost surely, 2^180256138 is an apocalyptic number.

180256138 is a deficient number, since it is larger than the sum of its proper divisors (90414650).

180256138 is an equidigital number, since it uses as much as digits as its factorization.

180256138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95528.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 180256138 is about 13425.9501712169. The cubic root of 180256138 is about 564.8893071582.

The spelling of 180256138 in words is "one hundred eighty million, two hundred fifty-six thousand, one hundred thirty-eight".