678870444946 has 16 divisors (see below), whose sum is σ = 1064543969088. Its totient is φ = 324077014800.

The previous prime is 678870444869. The next prime is 678870444977. The reversal of 678870444946 is 649444078876.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13614720 + ... + 13664491.

It is an arithmetic number, because the mean of its divisors is an integer number (66533998068).

Almost surely, 2^678870444946 is an apocalyptic number.

678870444946 is a deficient number, since it is larger than the sum of its proper divisors (385673524142).

678870444946 is a wasteful number, since it uses less digits than its factorization.

678870444946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27279777.

The product of its (nonzero) digits is 260112384, while the sum is 67.

The spelling of 678870444946 in words is "six hundred seventy-eight billion, eight hundred seventy million, four hundred forty-four thousand, nine hundred forty-six".