12778638594 has 32 divisors (see below), whose sum is σ = 26922490560. Its totient is φ = 4032345600.

The previous prime is 12778638589. The next prime is 12778638611. The reversal of 12778638594 is 49583687721.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113974 + ... + 196334.

It is an arithmetic number, because the mean of its divisors is an integer number (841327830).

Almost surely, 2^12778638594 is an apocalyptic number.

12778638594 is an abundant number, since it is smaller than the sum of its proper divisors (14143851966).

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

12778638594 is a wasteful number, since it uses less digits than its factorization.

12778638594 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83746.

The product of its digits is 20321280, while the sum is 60.

The spelling of 12778638594 in words is "twelve billion, seven hundred seventy-eight million, six hundred thirty-eight thousand, five hundred ninety-four".