12161538260 has 24 divisors (see below), whose sum is σ = 25548543720. Its totient is φ = 4862841344.

The previous prime is 12161538227. The next prime is 12161538271. The reversal of 12161538260 is 6283516121.

It can be written as a sum of positive squares in 4 ways, for example, as 14853316 + 12146684944 = 3854^2 + 110212^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12161538260.

It is a congruent number.

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, 53945 + ... + 165024.

It is an arithmetic number, because the mean of its divisors is an integer number (1064522655).

Almost surely, 2^12161538260 is an apocalyptic number.

12161538260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12161538260 is an abundant number, since it is smaller than the sum of its proper divisors (13387005460).

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

12161538260 is a wasteful number, since it uses less digits than its factorization.

12161538260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221755 (or 221753 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 35.

The spelling of 12161538260 in words is "twelve billion, one hundred sixty-one million, five hundred thirty-eight thousand, two hundred sixty".