12155835613 has 2 divisors, whose sum is σ = 12155835614. Its totient is φ = 12155835612.

The previous prime is 12155835611. The next prime is 12155835641. The reversal of 12155835613 is 31653855121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6444557284 + 5711278329 = 80278^2 + 75573^2 .

It is a cyclic number.

It is not a de Polignac number, because 12155835613 - 2¹ = 12155835611 is a prime.

Together with 12155835611, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12155835611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6077917806 + 6077917807.

It is an arithmetic number, because the mean of its divisors is an integer number (6077917807).

Almost surely, 2^12155835613 is an apocalyptic number.

It is an amenable number.

12155835613 is a deficient number, since it is larger than the sum of its proper divisors (1).

12155835613 is an equidigital number, since it uses as much as digits as its factorization.

12155835613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108000, while the sum is 40.

The spelling of 12155835613 in words is "twelve billion, one hundred fifty-five million, eight hundred thirty-five thousand, six hundred thirteen".