10205123609 has 4 divisors (see below), whose sum is σ = 10300498704. Its totient is φ = 10109748516.

The previous prime is 10205123603. The next prime is 10205123657. The reversal of 10205123609 is 90632150201.

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 a cyclic number.

It is not a de Polignac number, because 10205123609 - 2³² = 5910156313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10205123603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47687387 + ... + 47687600.

It is an arithmetic number, because the mean of its divisors is an integer number (2575124676).

Almost surely, 2^10205123609 is an apocalyptic number.

It is an amenable number.

10205123609 is a deficient number, since it is larger than the sum of its proper divisors (95375095).

10205123609 is an equidigital number, since it uses as much as digits as its factorization.

10205123609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95375094.

The product of its (nonzero) digits is 3240, while the sum is 29.

The spelling of 10205123609 in words is "ten billion, two hundred five million, one hundred twenty-three thousand, six hundred nine".