11909510105 has 4 divisors (see below), whose sum is σ = 14291412132. Its totient is φ = 9527608080.

The previous prime is 11909510051. The next prime is 11909510111. The reversal of 11909510105 is 50101590911.

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 3782127001 + 8127383104 = 61499^2 + 90152^2 .

It is a de Polignac number, because none of the positive numbers 2^k-11909510105 is a prime.

It is a super-2 number, since 2×11909510105² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1190951006 + ... + 1190951015.

It is an arithmetic number, because the mean of its divisors is an integer number (3572853033).

Almost surely, 2^11909510105 is an apocalyptic number.

It is an amenable number.

11909510105 is a deficient number, since it is larger than the sum of its proper divisors (2381902027).

11909510105 is an equidigital number, since it uses as much as digits as its factorization.

11909510105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2381902026.

The product of its (nonzero) digits is 2025, while the sum is 32.

The spelling of 11909510105 in words is "eleven billion, nine hundred nine million, five hundred ten thousand, one hundred five".