12861946078 has 16 divisors (see below), whose sum is σ = 19961282880. Its totient is φ = 6208253856.

The previous prime is 12861946073. The next prime is 12861946079. The reversal of 12861946078 is 87064916821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12861946073) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 487276 + ... + 512992.

It is an arithmetic number, because the mean of its divisors is an integer number (1247580180).

Almost surely, 2^12861946078 is an apocalyptic number.

12861946078 is a deficient number, since it is larger than the sum of its proper divisors (7099336802).

12861946078 is a wasteful number, since it uses less digits than its factorization.

12861946078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34371.

The product of its (nonzero) digits is 1161216, while the sum is 52.

The spelling of 12861946078 in words is "twelve billion, eight hundred sixty-one million, nine hundred forty-six thousand, seventy-eight".