56563978 has 12 divisors (see below), whose sum is σ = 87875190. Its totient is φ = 27305936.

The previous prime is 56563973. The next prime is 56563979. The reversal of 56563978 is 87936565.

56563978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 41641209 + 14922769 = 6453^2 + 3863^2 .

It is not an unprimeable number, because it can be changed into a prime (56563973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15133 + ... + 18496.

Almost surely, 2^56563978 is an apocalyptic number.

56563978 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

56563978 is a deficient number, since it is larger than the sum of its proper divisors (31311212).

56563978 is a wasteful number, since it uses less digits than its factorization.

56563978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33689 (or 33660 counting only the distinct ones).

The product of its digits is 1360800, while the sum is 49.

The square root of 56563978 is about 7520.9027383686. The cubic root of 56563978 is about 383.8662955011.

The spelling of 56563978 in words is "fifty-six million, five hundred sixty-three thousand, nine hundred seventy-eight".