105845947409 has 4 divisors (see below), whose sum is σ = 105859043904. Its totient is φ = 105832850916.

The previous prime is 105845947387. The next prime is 105845947429. The reversal of 105845947409 is 904749548501.

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 a de Polignac number, because none of the positive numbers 2^k-105845947409 is a prime.

It is a super-2 number, since 2×105845947409² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105845947429) 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, 6536117 + ... + 6552290.

It is an arithmetic number, because the mean of its divisors is an integer number (26464760976).

Almost surely, 2^105845947409 is an apocalyptic number.

It is an amenable number.

105845947409 is a deficient number, since it is larger than the sum of its proper divisors (13096495).

105845947409 is an equidigital number, since it uses as much as digits as its factorization.

105845947409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13096494.

The product of its (nonzero) digits is 7257600, while the sum is 56.

The spelling of 105845947409 in words is "one hundred five billion, eight hundred forty-five million, nine hundred forty-seven thousand, four hundred nine".