255631432109 has 2 divisors, whose sum is σ = 255631432110. Its totient is φ = 255631432108.

The previous prime is 255631432087. The next prime is 255631432183. The reversal of 255631432109 is 901234136552.

255631432109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 235950148009 + 19681284100 = 485747^2 + 140290^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255631432109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255631431109) 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, 127815716054 + 127815716055.

It is an arithmetic number, because the mean of its divisors is an integer number (127815716055).

Almost surely, 2^255631432109 is an apocalyptic number.

It is an amenable number.

255631432109 is a deficient number, since it is larger than the sum of its proper divisors (1).

255631432109 is an equidigital number, since it uses as much as digits as its factorization.

255631432109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 194400, while the sum is 41.

The spelling of 255631432109 in words is "two hundred fifty-five billion, six hundred thirty-one million, four hundred thirty-two thousand, one hundred nine".