12656203479378 has 16 divisors (see below), whose sum is σ = 28124896620960. Its totient is φ = 4218734493108.

The previous prime is 12656203479373. The next prime is 12656203479407. The reversal of 12656203479378 is 87397430265621.

It is a happy number.

12656203479378 is a `hidden beast` number, since 1 + 2 + 6 + 56 + 203 + 4 + 7 + 9 + 378 = 666.

It is a super-2 number, since 2×12656203479378² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12656203479373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117187069200 + ... + 117187069307.

It is an arithmetic number, because the mean of its divisors is an integer number (1757806038810).

It is a 2-persistent number, because it is pandigital, and so is 2⋅12656203479378 = 25312406958756, but 3⋅12656203479378 = 37968610438134 is not.

Almost surely, 2^{12656203479378} is an apocalyptic number.

12656203479378 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12656203479378 is an abundant number, since it is smaller than the sum of its proper divisors (15468693141582).

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

12656203479378 is a wasteful number, since it uses less digits than its factorization.

12656203479378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234374138518 (or 234374138512 counting only the distinct ones).

The product of its (nonzero) digits is 91445760, while the sum is 63.

The spelling of 12656203479378 in words is "twelve trillion, six hundred fifty-six billion, two hundred three million, four hundred seventy-nine thousand, three hundred seventy-eight".