30478564856 has 16 divisors (see below), whose sum is σ = 57194910240. Its totient is φ = 15226588800.

The previous prime is 30478564813. The next prime is 30478564877. The reversal of 30478564856 is 65846587403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1576496 + ... + 1595711.

It is an arithmetic number, because the mean of its divisors is an integer number (3574681890).

Almost surely, 2^30478564856 is an apocalyptic number.

It is an amenable number.

30478564856 is a deficient number, since it is larger than the sum of its proper divisors (26716345384).

30478564856 is a wasteful number, since it uses less digits than its factorization.

30478564856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3173414 (or 3173410 counting only the distinct ones).

The product of its (nonzero) digits is 19353600, while the sum is 56.

The spelling of 30478564856 in words is "thirty billion, four hundred seventy-eight million, five hundred sixty-four thousand, eight hundred fifty-six".