78728437626 has 8 divisors (see below), whose sum is σ = 157456875264. Its totient is φ = 26242812540.

The previous prime is 78728437591. The next prime is 78728437661. The reversal of 78728437626 is 62673482787.

It is an interprime number because it is at equal distance from previous prime (78728437591) and next prime (78728437661).

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

78728437626 is an admirable number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 78728437626.

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 3 ways as a sum of consecutive naturals, for example, 6560703130 + ... + 6560703141.

It is an arithmetic number, because the mean of its divisors is an integer number (19682109408).

Almost surely, 2^78728437626 is an apocalyptic number.

78728437626 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

78728437626 is a wasteful number, since it uses less digits than its factorization.

78728437626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13121406276.

The product of its digits is 37933056, while the sum is 60.

The spelling of 78728437626 in words is "seventy-eight billion, seven hundred twenty-eight million, four hundred thirty-seven thousand, six hundred twenty-six".