12478734405 has 24 divisors (see below), whose sum is σ = 22768218720. Its totient is φ = 6305044320.

The previous prime is 12478734397. The next prime is 12478734413. The reversal of 12478734405 is 50443787421.

12478734405 is a `hidden beast` number, since 124 + 7 + 87 + 3 + 440 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (12478734397) and next prime (12478734413).

It is not a de Polignac number, because 12478734405 - 2³ = 12478734397 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7296651 + ... + 7298360.

It is an arithmetic number, because the mean of its divisors is an integer number (948675780).

Almost surely, 2^12478734405 is an apocalyptic number.

12478734405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12478734405 is a deficient number, since it is larger than the sum of its proper divisors (10289484315).

12478734405 is a wasteful number, since it uses less digits than its factorization.

12478734405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14595041 (or 14595038 counting only the distinct ones).

The product of its (nonzero) digits is 752640, while the sum is 45.

The spelling of 12478734405 in words is "twelve billion, four hundred seventy-eight million, seven hundred thirty-four thousand, four hundred five".