12261555359 has 2 divisors, whose sum is σ = 12261555360. Its totient is φ = 12261555358.

The previous prime is 12261555331. The next prime is 12261555391. The reversal of 12261555359 is 95355516221.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12261555359 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12261555659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6130777679 + 6130777680.

It is an arithmetic number, because the mean of its divisors is an integer number (6130777680).

Almost surely, 2^12261555359 is an apocalyptic number.

12261555359 is a deficient number, since it is larger than the sum of its proper divisors (1).

12261555359 is an equidigital number, since it uses as much as digits as its factorization.

12261555359 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 405000, while the sum is 44.

The spelling of 12261555359 in words is "twelve billion, two hundred sixty-one million, five hundred fifty-five thousand, three hundred fifty-nine".