11805217151 has 48 divisors (see below), whose sum is σ = 15513273216. Its totient is φ = 8893753344.

The previous prime is 11805217147. The next prime is 11805217159. The reversal of 11805217151 is 15171250811.

It is not a de Polignac number, because 11805217151 - 2² = 11805217147 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11805217159) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1102415 + ... + 1113071.

It is an arithmetic number, because the mean of its divisors is an integer number (323193192).

Almost surely, 2^11805217151 is an apocalyptic number.

11805217151 is a deficient number, since it is larger than the sum of its proper divisors (3708056065).

11805217151 is a wasteful number, since it uses less digits than its factorization.

11805217151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10768 (or 10761 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 32.

Adding to 11805217151 its reverse (15171250811), we get a palindrome (26976467962).

The spelling of 11805217151 in words is "eleven billion, eight hundred five million, two hundred seventeen thousand, one hundred fifty-one".