12243161655 has 24 divisors (see below), whose sum is σ = 21243963312. Its totient is φ = 6522768384.

The previous prime is 12243161653. The next prime is 12243161699. The reversal of 12243161655 is 55616134221.

12243161655 is a `hidden beast` number, since 1 + 2 + 2 + 4 + 31 + 616 + 5 + 5 = 666.

It is not a de Polignac number, because 12243161655 - 2¹ = 12243161653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12243161653) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 101034 + ... + 186263.

It is an arithmetic number, because the mean of its divisors is an integer number (885165138).

Almost surely, 2^12243161655 is an apocalyptic number.

12243161655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12243161655 is a deficient number, since it is larger than the sum of its proper divisors (9000801657).

12243161655 is a wasteful number, since it uses less digits than its factorization.

12243161655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288255 (or 288252 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

Adding to 12243161655 its reverse (55616134221), we get a palindrome (67859295876).

The spelling of 12243161655 in words is "twelve billion, two hundred forty-three million, one hundred sixty-one thousand, six hundred fifty-five".