56566835890 has 16 divisors (see below), whose sum is σ = 102408864408. Its totient is φ = 22495943296.

The previous prime is 56566835887. The next prime is 56566835893. The reversal of 56566835890 is 9853866565.

It is an interprime number because it is at equal distance from previous prime (56566835887) and next prime (56566835893).

It can be written as a sum of positive squares in 4 ways, for example, as 52866425329 + 3700410561 = 229927^2 + 60831^2 .

It is not an unprimeable number, because it can be changed into a prime (56566835893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16347067 + ... + 16350526.

Almost surely, 2^56566835890 is an apocalyptic number.

56566835890 is a deficient number, since it is larger than the sum of its proper divisors (45842028518).

56566835890 is a wasteful number, since it uses less digits than its factorization.

56566835890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32697773.

The product of its (nonzero) digits is 46656000, while the sum is 61.

The spelling of 56566835890 in words is "fifty-six billion, five hundred sixty-six million, eight hundred thirty-five thousand, eight hundred ninety".