78844644616 has 16 divisors (see below), whose sum is σ = 148029008940. Its totient is φ = 39370242240.

The previous prime is 78844644583. The next prime is 78844644649. The reversal of 78844644616 is 61644644887.

It is an interprime number because it is at equal distance from previous prime (78844644583) and next prime (78844644649).

It can be written as a sum of positive squares in 2 ways, for example, as 76093222500 + 2751422116 = 275850^2 + 52454^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6503575 + ... + 6515686.

Almost surely, 2^78844644616 is an apocalyptic number.

It is an amenable number.

78844644616 is a deficient number, since it is larger than the sum of its proper divisors (69184364324).

78844644616 is a wasteful number, since it uses less digits than its factorization.

78844644616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13020024 (or 13020020 counting only the distinct ones).

The product of its digits is 24772608, while the sum is 58.

The spelling of 78844644616 in words is "seventy-eight billion, eight hundred forty-four million, six hundred forty-four thousand, six hundred sixteen".