12155751529 has 2 divisors, whose sum is σ = 12155751530. Its totient is φ = 12155751528.

The previous prime is 12155751511. The next prime is 12155751541. The reversal of 12155751529 is 92515755121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12149991529 + 5760000 = 110227^2 + 2400^2 .

It is a cyclic number.

It is not a de Polignac number, because 12155751529 - 2⁵ = 12155751497 is a prime.

It is not a weakly prime, because it can be changed into another prime (12155751929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6077875764 + 6077875765.

It is an arithmetic number, because the mean of its divisors is an integer number (6077875765).

Almost surely, 2^12155751529 is an apocalyptic number.

It is an amenable number.

12155751529 is a deficient number, since it is larger than the sum of its proper divisors (1).

12155751529 is an equidigital number, since it uses as much as digits as its factorization.

12155751529 is an evil number, because the sum of its binary digits is even.

The product of its digits is 157500, while the sum is 43.

The spelling of 12155751529 in words is "twelve billion, one hundred fifty-five million, seven hundred fifty-one thousand, five hundred twenty-nine".