67838945679 has 12 divisors (see below), whose sum is σ = 98399589600. Its totient is φ = 45036732384.

The previous prime is 67838945653. The next prime is 67838945711. The reversal of 67838945679 is 97654983876.

67838945679 is a `hidden beast` number, since 6 + 78 + 38 + 9 + 456 + 79 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-67838945679 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67838945879) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 15767014 + ... + 15771315.

It is an arithmetic number, because the mean of its divisors is an integer number (8199965800).

Almost surely, 2^67838945679 is an apocalyptic number.

67838945679 is a deficient number, since it is larger than the sum of its proper divisors (30560643921).

67838945679 is a wasteful number, since it uses less digits than its factorization.

67838945679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31538574 (or 31538571 counting only the distinct ones).

The product of its digits is 548674560, while the sum is 72.

The spelling of 67838945679 in words is "sixty-seven billion, eight hundred thirty-eight million, nine hundred forty-five thousand, six hundred seventy-nine".