11809809075 has 12 divisors (see below), whose sum is σ = 19525551128. Its totient is φ = 6298564800.

The previous prime is 11809809059. The next prime is 11809809091. The reversal of 11809809075 is 57090890811.

It is an interprime number because it is at equal distance from previous prime (11809809059) and next prime (11809809091).

It is not a de Polignac number, because 11809809075 - 2⁴ = 11809809059 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 78731986 + ... + 78732135.

Almost surely, 2^11809809075 is an apocalyptic number.

11809809075 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11809809075 is a deficient number, since it is larger than the sum of its proper divisors (7715742053).

11809809075 is a wasteful number, since it uses less digits than its factorization.

11809809075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157464134 (or 157464129 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 48.

The spelling of 11809809075 in words is "eleven billion, eight hundred nine million, eight hundred nine thousand, seventy-five".