2078578656 has 216 divisors, whose sum is σ = 7426207152. Its totient is φ = 539827200.

The previous prime is 2078578651. The next prime is 2078578657. The reversal of 2078578656 is 6568758702.

2078578656 is a `hidden beast` number, since 2 + 0 + 7 + 8 + 578 + 65 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2078578651) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 239676 + ... + 248196.

Almost surely, 2^2078578656 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 2078578656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3713103576).

2078578656 is an abundant number, since it is smaller than the sum of its proper divisors (5347628496).

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

2078578656 is a wasteful number, since it uses less digits than its factorization.

2078578656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8566 (or 8544 counting only the distinct ones).

The product of its (nonzero) digits is 5644800, while the sum is 54.

The square root of 2078578656 is about 45591.4318266053. The cubic root of 2078578656 is about 1276.2100328063.

The spelling of 2078578656 in words is "two billion, seventy-eight million, five hundred seventy-eight thousand, six hundred fifty-six".