159440000261 has 2 divisors, whose sum is σ = 159440000262. Its totient is φ = 159440000260.

The previous prime is 159440000249. The next prime is 159440000267. The reversal of 159440000261 is 162000044951.

159440000261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 141672443236 + 17767557025 = 376394^2 + 133295^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-159440000261 is a prime.

It is a super-3 number, since 3×159440000261³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (159440000267) 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, 79720000130 + 79720000131.

It is an arithmetic number, because the mean of its divisors is an integer number (79720000131).

Almost surely, 2^159440000261 is an apocalyptic number.

It is an amenable number.

159440000261 is a deficient number, since it is larger than the sum of its proper divisors (1).

159440000261 is an equidigital number, since it uses as much as digits as its factorization.

159440000261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 32.

The spelling of 159440000261 in words is "one hundred fifty-nine billion, four hundred forty million, two hundred sixty-one", and thus it is an aban number.