12245567778 has 48 divisors (see below), whose sum is σ = 27165790080. Its totient is φ = 3984476832.

The previous prime is 12245567777. The next prime is 12245567791. The reversal of 12245567778 is 87776554221.

12245567778 is a `hidden beast` number, since 1 + 2 + 2 + 4 + 5 + 567 + 7 + 78 = 666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (12245567771) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1592928 + ... + 1600596.

It is an arithmetic number, because the mean of its divisors is an integer number (565953960).

Almost surely, 2^12245567778 is an apocalyptic number.

12245567778 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12245567778 is an abundant number, since it is smaller than the sum of its proper divisors (14920222302).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12245567778 is a wasteful number, since it uses less digits than its factorization.

12245567778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9783 (or 9780 counting only the distinct ones).

The product of its digits is 6585600, while the sum is 54.

The spelling of 12245567778 in words is "twelve billion, two hundred forty-five million, five hundred sixty-seven thousand, seven hundred seventy-eight".