13122645678 has 64 divisors (see below), whose sum is σ = 32501952000. Its totient is φ = 3900223872.

The previous prime is 13122645649. The next prime is 13122645703. The reversal of 13122645678 is 87654622131.

13122645678 is a `hidden beast` number, since 1 + 3 + 1 + 22 + 64 + 567 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 358738 + ... + 393621.

It is an arithmetic number, because the mean of its divisors is an integer number (507843000).

Almost surely, 2^13122645678 is an apocalyptic number.

13122645678 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

13122645678 is an abundant number, since it is smaller than the sum of its proper divisors (19379306322).

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

13122645678 is a wasteful number, since it uses less digits than its factorization.

13122645678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 752406 (or 752400 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The spelling of 13122645678 in words is "thirteen billion, one hundred twenty-two million, six hundred forty-five thousand, six hundred seventy-eight".