12647742478 has 32 divisors (see below), whose sum is σ = 22498629120. Its totient is φ = 5219817120.

The previous prime is 12647742461. The next prime is 12647742491. The reversal of 12647742478 is 87424774621.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105213 + ... + 190696.

It is an arithmetic number, because the mean of its divisors is an integer number (703082160).

Almost surely, 2^12647742478 is an apocalyptic number.

12647742478 is a deficient number, since it is larger than the sum of its proper divisors (9850886642).

12647742478 is a wasteful number, since it uses less digits than its factorization.

12647742478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296032.

The product of its digits is 4214784, while the sum is 52.

The spelling of 12647742478 in words is "twelve billion, six hundred forty-seven million, seven hundred forty-two thousand, four hundred seventy-eight".