12294831388978 has 8 divisors (see below), whose sum is σ = 18447140235420. Its totient is φ = 6145784643840.

The previous prime is 12294831388963. The next prime is 12294831389041. The reversal of 12294831388978 is 87988313849221.

It can be written as a sum of positive squares in 2 ways, for example, as 12230316912969 + 64514476009 = 3497187^2 + 253997^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 12294831388978.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 815515903 + ... + 815530978.

Almost surely, 2^{12294831388978} is an apocalyptic number.

12294831388978 is a deficient number, since it is larger than the sum of its proper divisors (6152308846442).

12294831388978 is a wasteful number, since it uses less digits than its factorization.

12294831388978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1631050652.

The product of its digits is 334430208, while the sum is 73.

The spelling of 12294831388978 in words is "twelve trillion, two hundred ninety-four billion, eight hundred thirty-one million, three hundred eighty-eight thousand, nine hundred seventy-eight".