56505663 has 6 divisors (see below), whose sum is σ = 81619304. Its totient is φ = 37670436.

The previous prime is 56505661. The next prime is 56505689. The reversal of 56505663 is 36650565.

It is a happy number.

It is not a de Polignac number, because 56505663 - 2¹ = 56505661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56505661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3139195 + ... + 3139212.

Almost surely, 2^56505663 is an apocalyptic number.

56505663 is a deficient number, since it is larger than the sum of its proper divisors (25113641).

56505663 is a wasteful number, since it uses less digits than its factorization.

56505663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6278413 (or 6278410 counting only the distinct ones).

The product of its (nonzero) digits is 81000, while the sum is 36.

The square root of 56505663 is about 7517.0248769044. The cubic root of 56505663 is about 383.7343336593.

The spelling of 56505663 in words is "fifty-six million, five hundred five thousand, six hundred sixty-three".