56105384889 has 4 divisors (see below), whose sum is σ = 74807179856. Its totient is φ = 37403589924.

The previous prime is 56105384873. The next prime is 56105384891. The reversal of 56105384889 is 98848350165.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 56105384889 - 2⁴ = 56105384873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56105384389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9350897479 + ... + 9350897484.

It is an arithmetic number, because the mean of its divisors is an integer number (18701794964).

Almost surely, 2^56105384889 is an apocalyptic number.

It is an amenable number.

56105384889 is a deficient number, since it is larger than the sum of its proper divisors (18701794967).

56105384889 is a wasteful number, since it uses less digits than its factorization.

56105384889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18701794966.

The product of its (nonzero) digits is 8294400, while the sum is 57.

The spelling of 56105384889 in words is "fifty-six billion, one hundred five million, three hundred eighty-four thousand, eight hundred eighty-nine".