10565128789 has 4 divisors (see below), whose sum is σ = 10579086124. Its totient is φ = 10551171456.

The previous prime is 10565128727. The next prime is 10565128807. The reversal of 10565128789 is 98782156501.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6865448164 + 3699680625 = 82858^2 + 60825^2 .

It is a cyclic number.

It is not a de Polignac number, because 10565128789 - 2⁷ = 10565128661 is a prime.

It is a super-2 number, since 2×10565128789² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10565125789) 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, 6977532 + ... + 6979045.

It is an arithmetic number, because the mean of its divisors is an integer number (2644771531).

Almost surely, 2^10565128789 is an apocalyptic number.

It is an amenable number.

10565128789 is a deficient number, since it is larger than the sum of its proper divisors (13957335).

10565128789 is an equidigital number, since it uses as much as digits as its factorization.

10565128789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13957334.

The product of its (nonzero) digits is 1209600, while the sum is 52.

The spelling of 10565128789 in words is "ten billion, five hundred sixty-five million, one hundred twenty-eight thousand, seven hundred eighty-nine".