11781005284 has 12 divisors (see below), whose sum is σ = 20651530284. Its totient is φ = 5880568064.

The previous prime is 11781005279. The next prime is 11781005303. The reversal of 11781005284 is 48250018711.

It can be written as a sum of positive squares in 2 ways, for example, as 9845005284 + 1936000000 = 99222^2 + 44000^2 .

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, 2480977 + ... + 2485720.

It is an arithmetic number, because the mean of its divisors is an integer number (1720960857).

Almost surely, 2^11781005284 is an apocalyptic number.

It is an amenable number.

11781005284 is a deficient number, since it is larger than the sum of its proper divisors (8870525000).

11781005284 is a wasteful number, since it uses less digits than its factorization.

11781005284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4967294 (or 4967292 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 37.

The spelling of 11781005284 in words is "eleven billion, seven hundred eighty-one million, five thousand, two hundred eighty-four".