12155068537 has 2 divisors, whose sum is σ = 12155068538. Its totient is φ = 12155068536.

The previous prime is 12155068507. The next prime is 12155068571. The reversal of 12155068537 is 73586055121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10423593216 + 1731475321 = 102096^2 + 41611^2 .

It is a cyclic number.

It is not a de Polignac number, because 12155068537 - 2¹⁵ = 12155035769 is a prime.

It is a super-2 number, since 2×12155068537² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12155068493 and 12155068502.

It is not a weakly prime, because it can be changed into another prime (12155068507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6077534268 + 6077534269.

It is an arithmetic number, because the mean of its divisors is an integer number (6077534269).

Almost surely, 2^12155068537 is an apocalyptic number.

It is an amenable number.

12155068537 is a deficient number, since it is larger than the sum of its proper divisors (1).

12155068537 is an equidigital number, since it uses as much as digits as its factorization.

12155068537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252000, while the sum is 43.

The spelling of 12155068537 in words is "twelve billion, one hundred fifty-five million, sixty-eight thousand, five hundred thirty-seven".