12738705078 has 64 divisors (see below), whose sum is σ = 29808518400. Its totient is φ = 3588024960.

The previous prime is 12738705073. The next prime is 12738705079. The reversal of 12738705078 is 87050783721.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12738705071) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29373 + ... + 162296.

It is an arithmetic number, because the mean of its divisors is an integer number (465758100).

Almost surely, 2^12738705078 is an apocalyptic number.

12738705078 is an abundant number, since it is smaller than the sum of its proper divisors (17069813322).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12738705078 is a wasteful number, since it uses less digits than its factorization.

12738705078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191757.

The product of its (nonzero) digits is 658560, while the sum is 48.

The spelling of 12738705078 in words is "twelve billion, seven hundred thirty-eight million, seven hundred five thousand, seventy-eight".