12340340155 has 16 divisors (see below), whose sum is σ = 17397291744. Its totient is φ = 8284423680.

The previous prime is 12340340149. The next prime is 12340340161. The reversal of 12340340155 is 55104304321.

It is an interprime number because it is at equal distance from previous prime (12340340149) and next prime (12340340161).

It is not a de Polignac number, because 12340340155 - 2⁷ = 12340340027 is a prime.

It is a super-2 number, since 2×12340340155² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8628894 + ... + 8630323.

It is an arithmetic number, because the mean of its divisors is an integer number (1087330734).

Almost surely, 2^12340340155 is an apocalyptic number.

12340340155 is a deficient number, since it is larger than the sum of its proper divisors (5056951589).

12340340155 is a wasteful number, since it uses less digits than its factorization.

12340340155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17259246.

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 12340340155 its reverse (55104304321), we get a palindrome (67444644476).

The spelling of 12340340155 in words is "twelve billion, three hundred forty million, three hundred forty thousand, one hundred fifty-five".