78229241856 has 256 divisors, whose sum is σ = 239858100000. Its totient is φ = 25168969728.

The previous prime is 78229241801. The next prime is 78229241863. The reversal of 78229241856 is 65814292287.

78229241856 is a `hidden beast` number, since 78 + 22 + 92 + 418 + 56 = 666.

It is a tau number, because it is divible by the number of its divisors (256).

It is a super-2 number, since 2×78229241856² (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 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, 25655820 + ... + 25658868.

Almost surely, 2^78229241856 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 78229241856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119929050000).

78229241856 is an abundant number, since it is smaller than the sum of its proper divisors (161628858144).

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

78229241856 is an equidigital number, since it uses as much as digits as its factorization.

78229241856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3117 (or 3083 counting only the distinct ones).

The product of its digits is 3870720, while the sum is 54.

The spelling of 78229241856 in words is "seventy-eight billion, two hundred twenty-nine million, two hundred forty-one thousand, eight hundred fifty-six".