12161556363 has 8 divisors (see below), whose sum is σ = 17689536576. Its totient is φ = 7370640200.

The previous prime is 12161556361. The next prime is 12161556419. The reversal of 12161556363 is 36365516121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12161556363 - 2¹ = 12161556361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12161556361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 184265973 + ... + 184266038.

It is an arithmetic number, because the mean of its divisors is an integer number (2211192072).

Almost surely, 2^12161556363 is an apocalyptic number.

12161556363 is a deficient number, since it is larger than the sum of its proper divisors (5527980213).

12161556363 is a wasteful number, since it uses less digits than its factorization.

12161556363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368532025.

The product of its digits is 97200, while the sum is 39.

The spelling of 12161556363 in words is "twelve billion, one hundred sixty-one million, five hundred fifty-six thousand, three hundred sixty-three".