56665402563 has 24 divisors (see below), whose sum is σ = 95879125440. Its totient is φ = 29436571920.

The previous prime is 56665402553. The next prime is 56665402621. The reversal of 56665402563 is 36520456665.

It is not a de Polignac number, because 56665402563 - 2¹⁰ = 56665401539 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56665402553) 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 23 ways as a sum of consecutive naturals, for example, 17520153 + ... + 17523386.

It is an arithmetic number, because the mean of its divisors is an integer number (3994963560).

Almost surely, 2^56665402563 is an apocalyptic number.

56665402563 is a deficient number, since it is larger than the sum of its proper divisors (39213722877).

56665402563 is a wasteful number, since it uses less digits than its factorization.

56665402563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35043567 (or 35043560 counting only the distinct ones).

The product of its (nonzero) digits is 3888000, while the sum is 48.

The spelling of 56665402563 in words is "fifty-six billion, six hundred sixty-five million, four hundred two thousand, five hundred sixty-three".