11805281380 has 24 divisors (see below), whose sum is σ = 24798264120. Its totient is φ = 4720746240.

The previous prime is 11805281377. The next prime is 11805281393. The reversal of 11805281380 is 8318250811.

It can be written as a sum of positive squares in 4 ways, for example, as 537034276 + 11268247104 = 23174^2 + 106152^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13051 + ... + 154210.

It is an arithmetic number, because the mean of its divisors is an integer number (1033261005).

Almost surely, 2^11805281380 is an apocalyptic number.

11805281380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11805281380 is an abundant number, since it is smaller than the sum of its proper divisors (12992982740).

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

11805281380 is a wasteful number, since it uses less digits than its factorization.

11805281380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170799 (or 170797 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 37.

The spelling of 11805281380 in words is "eleven billion, eight hundred five million, two hundred eighty-one thousand, three hundred eighty".