7678448556 has 24 divisors (see below), whose sum is σ = 17953797120. Its totient is φ = 2554137552.

The previous prime is 7678448539. The next prime is 7678448579. The reversal of 7678448556 is 6558448767.

It is a self number, because there is not a number n which added to its sum of digits gives 7678448556.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 662176 + ... + 673671.

It is an arithmetic number, because the mean of its divisors is an integer number (748074880).

Almost surely, 2^7678448556 is an apocalyptic number.

It is an amenable number.

7678448556 is an abundant number, since it is smaller than the sum of its proper divisors (10275348564).

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

7678448556 is a wasteful number, since it uses less digits than its factorization.

7678448556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1336333 (or 1336331 counting only the distinct ones).

The product of its digits is 45158400, while the sum is 60.

The square root of 7678448556 is about 87626.7570779611. The cubic root of 7678448556 is about 1972.8367967005.

The spelling of 7678448556 in words is "seven billion, six hundred seventy-eight million, four hundred forty-eight thousand, five hundred fifty-six".