78564615336 has 128 divisors (see below), whose sum is σ = 220822694400. Its totient is φ = 25878528000.

The previous prime is 78564615301. The next prime is 78564615341. The reversal of 78564615336 is 63351646587.

78564615336 is a `hidden beast` number, since 78 + 564 + 6 + 1 + 5 + 3 + 3 + 6 = 666.

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

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, 15732456 + ... + 15737448.

It is an arithmetic number, because the mean of its divisors is an integer number (1725177300).

Almost surely, 2^78564615336 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 78564615336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110411347200).

78564615336 is an abundant number, since it is smaller than the sum of its proper divisors (142258079064).

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

78564615336 is a wasteful number, since it uses less digits than its factorization.

78564615336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5856 (or 5846 counting only the distinct ones).

The product of its digits is 10886400, while the sum is 54.

The spelling of 78564615336 in words is "seventy-eight billion, five hundred sixty-four million, six hundred fifteen thousand, three hundred thirty-six".