12261555343 has 4 divisors (see below), whose sum is σ = 12312433408. Its totient is φ = 12210677280.

The previous prime is 12261555331. The next prime is 12261555359. The reversal of 12261555343 is 34355516221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12261555343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12261555143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25438671 + ... + 25439152.

It is an arithmetic number, because the mean of its divisors is an integer number (3078108352).

Almost surely, 2^12261555343 is an apocalyptic number.

12261555343 is a deficient number, since it is larger than the sum of its proper divisors (50878065).

12261555343 is an equidigital number, since it uses as much as digits as its factorization.

12261555343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50878064.

The product of its digits is 108000, while the sum is 37.

The spelling of 12261555343 in words is "twelve billion, two hundred sixty-one million, five hundred fifty-five thousand, three hundred forty-three".