12178922450 has 18 divisors (see below), whose sum is σ = 22654247301. Its totient is φ = 4871256840.

The previous prime is 12178922443. The next prime is 12178922471. The reversal of 12178922450 is 5422987121.

It can be written as a sum of positive squares in 2 ways, for example, as 11935344001 + 243578449 = 109249^2 + 15607^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=78035.

It is a super-2 number, since 2×12178922450² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12178922398 and 12178922407.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 772547 + ... + 788153.

Almost surely, 2^12178922450 is an apocalyptic number.

12178922450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12178922450 is a deficient number, since it is larger than the sum of its proper divisors (10475324851).

12178922450 is an frugal number, since it uses more digits than its factorization.

12178922450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31226 (or 15614 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 41.

The spelling of 12178922450 in words is "twelve billion, one hundred seventy-eight million, nine hundred twenty-two thousand, four hundred fifty".