11805115464 has 24 divisors (see below), whose sum is σ = 31972187910. Its totient is φ = 3935038464.

The previous prime is 11805115459. The next prime is 11805115471. The reversal of 11805115464 is 46451150811.

11805115464 is a `hidden beast` number, since 1 + 1 + 80 + 5 + 115 + 464 = 666.

11805115464 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 8137844100 + 3667271364 = 90210^2 + 60558^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×11805115464² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 81979897 + ... + 81980040.

Almost surely, 2^11805115464 is an apocalyptic number.

It is an amenable number.

11805115464 is an abundant number, since it is smaller than the sum of its proper divisors (20167072446).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11805115464 is a wasteful number, since it uses less digits than its factorization.

11805115464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163959949 (or 163959942 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 36.

It can be divided in two parts, 1180 and 5115464, that added together give a square (5116644 = 2262²).

The spelling of 11805115464 in words is "eleven billion, eight hundred five million, one hundred fifteen thousand, four hundred sixty-four".