12145902508478 has 32 divisors (see below), whose sum is σ = 19408180413600. Its totient is φ = 5684290089984.

The previous prime is 12145902508423. The next prime is 12145902508489. The reversal of 12145902508478 is 87480520954121.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 3001976 + ... + 5770932.

It is an arithmetic number, because the mean of its divisors is an integer number (606505637925).

Almost surely, 2^{12145902508478} is an apocalyptic number.

12145902508478 is a deficient number, since it is larger than the sum of its proper divisors (7262277905122).

12145902508478 is a wasteful number, since it uses less digits than its factorization.

12145902508478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2770364.

The product of its (nonzero) digits is 6451200, while the sum is 56.

The spelling of 12145902508478 in words is "twelve trillion, one hundred forty-five billion, nine hundred two million, five hundred eight thousand, four hundred seventy-eight".