12378512050 has 12 divisors (see below), whose sum is σ = 23024032506. Its totient is φ = 4951404800.

The previous prime is 12378512011. The next prime is 12378512053. The reversal of 12378512050 is 5021587321.

It can be written as a sum of positive squares in 3 ways, for example, as 8799002809 + 3579509241 = 93803^2 + 59829^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12378511997 and 12378512015.

It is not an unprimeable number, because it can be changed into a prime (12378512053) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 123785071 + ... + 123785170.

Almost surely, 2^12378512050 is an apocalyptic number.

12378512050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12378512050 is a deficient number, since it is larger than the sum of its proper divisors (10645520456).

12378512050 is a wasteful number, since it uses less digits than its factorization.

12378512050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247570253 (or 247570248 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 34.

The spelling of 12378512050 in words is "twelve billion, three hundred seventy-eight million, five hundred twelve thousand, fifty".