12478519720940 has 96 divisors (see below), whose sum is σ = 34149360841344. Its totient is φ = 3716937216000.

The previous prime is 12478519720937. The next prime is 12478519720943. The reversal of 12478519720940 is 4902791587421.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12478519720937) and next prime (12478519720943).

It is a self number, because there is not a number n which added to its sum of digits gives 12478519720940.

It is not an unprimeable number, because it can be changed into a prime (12478519720943) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 201625811 + ... + 201687690.

It is an arithmetic number, because the mean of its divisors is an integer number (355722508764).

Almost surely, 2^{12478519720940} is an apocalyptic number.

12478519720940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12478519720940 is an abundant number, since it is smaller than the sum of its proper divisors (21670841120404).

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

12478519720940 is a wasteful number, since it uses less digits than its factorization.

12478519720940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403313547 (or 403313545 counting only the distinct ones).

The product of its (nonzero) digits is 10160640, while the sum is 59.

The spelling of 12478519720940 in words is "twelve trillion, four hundred seventy-eight billion, five hundred nineteen million, seven hundred twenty thousand, nine hundred forty".