56643131023 has 4 divisors (see below), whose sum is σ = 57018251248. Its totient is φ = 56268010800.

The previous prime is 56643131009. The next prime is 56643131029. The reversal of 56643131023 is 32013134665.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 56643131023 - 2⁵ = 56643130991 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56643131023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56643131029) 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 3 ways as a sum of consecutive naturals, for example, 187559886 + ... + 187560187.

It is an arithmetic number, because the mean of its divisors is an integer number (14254562812).

Almost surely, 2^56643131023 is an apocalyptic number.

56643131023 is a deficient number, since it is larger than the sum of its proper divisors (375120225).

56643131023 is a wasteful number, since it uses less digits than its factorization.

56643131023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375120224.

The product of its (nonzero) digits is 38880, while the sum is 34.

Adding to 56643131023 its reverse (32013134665), we get a palindrome (88656265688).

The spelling of 56643131023 in words is "fifty-six billion, six hundred forty-three million, one hundred thirty-one thousand, twenty-three".