12578742278 has 8 divisors (see below), whose sum is σ = 18877265568. Its totient is φ = 6286320424.

The previous prime is 12578742271. The next prime is 12578742307. The reversal of 12578742278 is 87224787521.

It is a happy number.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12578742271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1520201 + ... + 1528452.

It is an arithmetic number, because the mean of its divisors is an integer number (2359658196).

Almost surely, 2^12578742278 is an apocalyptic number.

12578742278 is a deficient number, since it is larger than the sum of its proper divisors (6298523290).

12578742278 is a wasteful number, since it uses less digits than its factorization.

12578742278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3050718.

The product of its digits is 3512320, while the sum is 53.

The spelling of 12578742278 in words is "twelve billion, five hundred seventy-eight million, seven hundred forty-two thousand, two hundred seventy-eight".