178545122116 has 27 divisors (see below), whose sum is σ = 320322828343. Its totient is φ = 87078279680.

The previous prime is 178545122101. The next prime is 178545122213. The reversal of 178545122116 is 611221545871.

The square root of 178545122116 is 422546.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 31162840900 + 147382281216 = 176530^2 + 383904^2 .

It is a Duffinian number.

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 in 8 ways as a sum of consecutive naturals, for example, 34646196 + ... + 34651348.

Almost surely, 2^178545122116 is an apocalyptic number.

178545122116 is the 422546-th square number.

It is an amenable number.

178545122116 is a deficient number, since it is larger than the sum of its proper divisors (141777706227).

178545122116 is an frugal number, since it uses more digits than its factorization.

178545122116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10392 (or 5196 counting only the distinct ones).

The product of its digits is 134400, while the sum is 43.

Adding to 178545122116 its reverse (611221545871), we get a palindrome (789766667987).

The spelling of 178545122116 in words is "one hundred seventy-eight billion, five hundred forty-five million, one hundred twenty-two thousand, one hundred sixteen".