12473265978 has 40 divisors (see below), whose sum is σ = 28127433972. Its totient is φ = 4131264384.

The previous prime is 12473265971. The next prime is 12473266019. The reversal of 12473265978 is 87956237421.

It is a happy number.

12473265978 is a `hidden beast` number, since 1 + 2 + 47 + 3 + 2 + 6 + 597 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 10624867929 + 1848398049 = 103077^2 + 42993^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12473265971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 219775 + ... + 270642.

Almost surely, 2^12473265978 is an apocalyptic number.

12473265978 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12473265978 is an abundant number, since it is smaller than the sum of its proper divisors (15654167994).

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

12473265978 is a wasteful number, since it uses less digits than its factorization.

12473265978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490588 (or 490579 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 54.

The spelling of 12473265978 in words is "twelve billion, four hundred seventy-three million, two hundred sixty-five thousand, nine hundred seventy-eight".