78804628256 has 96 divisors (see below), whose sum is σ = 166397943600. Its totient is φ = 36606836736.

The previous prime is 78804628249. The next prime is 78804628261. The reversal of 78804628256 is 65282640887.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 8229392656 + 70575235600 = 90716^2 + 265660^2 .

It is a hoax number, since the sum of its digits (56) coincides with the sum of the digits of its distinct prime factors.

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, 22846820 + ... + 22850268.

Almost surely, 2^78804628256 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 78804628256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83198971800).

78804628256 is an abundant number, since it is smaller than the sum of its proper divisors (87593315344).

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

78804628256 is a wasteful number, since it uses less digits than its factorization.

78804628256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4006 (or 3998 counting only the distinct ones).

The product of its (nonzero) digits is 10321920, while the sum is 56.

The spelling of 78804628256 in words is "seventy-eight billion, eight hundred four million, six hundred twenty-eight thousand, two hundred fifty-six".