78316615606 has 32 divisors (see below), whose sum is σ = 121940945280. Its totient is φ = 37698079104.

The previous prime is 78316615549. The next prime is 78316615613. The reversal of 78316615606 is 60651661387.

It is a happy number.

It is a super-2 number, since 2×78316615606² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78316615606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3078085 + ... + 3103423.

It is an arithmetic number, because the mean of its divisors is an integer number (3810654540).

Almost surely, 2^78316615606 is an apocalyptic number.

78316615606 is a deficient number, since it is larger than the sum of its proper divisors (43624329674).

78316615606 is a wasteful number, since it uses less digits than its factorization.

78316615606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25900.

The product of its (nonzero) digits is 1088640, while the sum is 49.

The spelling of 78316615606 in words is "seventy-eight billion, three hundred sixteen million, six hundred fifteen thousand, six hundred six".