12985459478 has 8 divisors (see below), whose sum is σ = 19486060272. Its totient is φ = 6490106056.

The previous prime is 12985459463. The next prime is 12985459493. The reversal of 12985459478 is 87495458921.

It is an interprime number because it is at equal distance from previous prime (12985459463) and next prime (12985459493).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12985459478.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1305650 + ... + 1315557.

It is an arithmetic number, because the mean of its divisors is an integer number (2435757534).

Almost surely, 2^12985459478 is an apocalyptic number.

12985459478 is a deficient number, since it is larger than the sum of its proper divisors (6500600794).

12985459478 is a wasteful number, since it uses less digits than its factorization.

12985459478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2623686.

The product of its digits is 29030400, while the sum is 62.

The spelling of 12985459478 in words is "twelve billion, nine hundred eighty-five million, four hundred fifty-nine thousand, four hundred seventy-eight".