78418319616 has 288 divisors, whose sum is σ = 285413694720. Its totient is φ = 20681588736.

The previous prime is 78418319587. The next prime is 78418319653. The reversal of 78418319616 is 61691381487.

78418319616 is a `hidden beast` number, since 7 + 8 + 4 + 1 + 8 + 3 + 19 + 616 = 666.

It is a tau number, because it is divible by the number of its divisors (288).

It is a super-2 number, since 2×78418319616² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 566656 + ... + 691328.

Almost surely, 2^78418319616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78418319616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (142706847360).

78418319616 is an abundant number, since it is smaller than the sum of its proper divisors (206995375104).

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

78418319616 is a wasteful number, since it uses less digits than its factorization.

78418319616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124718 (or 124698 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 54.

The spelling of 78418319616 in words is "seventy-eight billion, four hundred eighteen million, three hundred nineteen thousand, six hundred sixteen".