7878626685479 has 8 divisors (see below), whose sum is σ = 8595811009920. Its totient is φ = 7161599950200.

The previous prime is 7878626685473. The next prime is 7878626685499. The reversal of 7878626685479 is 9745866268787.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7878626685479 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7878626685397 and 7878626685406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7878626685473) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 39292739 + ... + 39492740.

It is an arithmetic number, because the mean of its divisors is an integer number (1074476376240).

Almost surely, 2^{7878626685479} is an apocalyptic number.

7878626685479 is a deficient number, since it is larger than the sum of its proper divisors (717184324441).

7878626685479 is a wasteful number, since it uses less digits than its factorization.

7878626685479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78794581.

The product of its digits is 13655900160, while the sum is 83.

The spelling of 7878626685479 in words is "seven trillion, eight hundred seventy-eight billion, six hundred twenty-six million, six hundred eighty-five thousand, four hundred seventy-nine".