12155835457 has 2 divisors, whose sum is σ = 12155835458. Its totient is φ = 12155835456.

The previous prime is 12155835443. The next prime is 12155835493. The reversal of 12155835457 is 75453855121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7378122816 + 4777712641 = 85896^2 + 69121^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12155835457 is a prime.

It is not a weakly prime, because it can be changed into another prime (12155835407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6077917728 + 6077917729.

It is an arithmetic number, because the mean of its divisors is an integer number (6077917729).

Almost surely, 2^12155835457 is an apocalyptic number.

It is an amenable number.

12155835457 is a deficient number, since it is larger than the sum of its proper divisors (1).

12155835457 is an equidigital number, since it uses as much as digits as its factorization.

12155835457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 840000, while the sum is 46.

The spelling of 12155835457 in words is "twelve billion, one hundred fifty-five million, eight hundred thirty-five thousand, four hundred fifty-seven".