78749785368 has 144 divisors (see below), whose sum is σ = 218100996360. Its totient is φ = 25668956160.

The previous prime is 78749785339. The next prime is 78749785379. The reversal of 78749785368 is 86358794787.

78749785368 is a `hidden beast` number, since 7 + 87 + 4 + 9 + 7 + 8 + 536 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a junction number, because it is equal to n+sod(n) for n = 78749785296 and 78749785305.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 51706255 + ... + 51707777.

Almost surely, 2^78749785368 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 78749785368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109050498180).

78749785368 is an abundant number, since it is smaller than the sum of its proper divisors (139351210992).

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

78749785368 is a wasteful number, since it uses less digits than its factorization.

78749785368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1850 (or 1782 counting only the distinct ones).

The product of its digits is 568995840, while the sum is 72.

The spelling of 78749785368 in words is "seventy-eight billion, seven hundred forty-nine million, seven hundred eighty-five thousand, three hundred sixty-eight".