11809804735 has 4 divisors (see below), whose sum is σ = 14171765688. Its totient is φ = 9447843784.

The previous prime is 11809804723. The next prime is 11809804757. The reversal of 11809804735 is 53740890811.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 53740890811 = 1399 ⋅38413789.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11809804735 is a prime.

It is a Duffinian number.

It is a congruent 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, 1180980469 + ... + 1180980478.

It is an arithmetic number, because the mean of its divisors is an integer number (3542941422).

Almost surely, 2^11809804735 is an apocalyptic number.

11809804735 is a deficient number, since it is larger than the sum of its proper divisors (2361960953).

11809804735 is an equidigital number, since it uses as much as digits as its factorization.

11809804735 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2361960952.

The product of its (nonzero) digits is 241920, while the sum is 46.

The spelling of 11809804735 in words is "eleven billion, eight hundred nine million, eight hundred four thousand, seven hundred thirty-five".