259968305781 has 12 divisors (see below), whose sum is σ = 375850233408. Its totient is φ = 173155069224.

The previous prime is 259968305741. The next prime is 259968305797. The reversal of 259968305781 is 187503869952.

259968305781 is a `hidden beast` number, since 2 + 59 + 9 + 6 + 8 + 3 + 0 + 578 + 1 = 666.

259968305781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-259968305781 is a prime.

It is a super-2 number, since 2×259968305781² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (259968305731) 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 in 11 ways as a sum of consecutive naturals, for example, 13084075 + ... + 13103928.

It is an arithmetic number, because the mean of its divisors is an integer number (31320852784).

Almost surely, 2^259968305781 is an apocalyptic number.

It is an amenable number.

259968305781 is a deficient number, since it is larger than the sum of its proper divisors (115881927627).

259968305781 is a wasteful number, since it uses less digits than its factorization.

259968305781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26189112 (or 26189109 counting only the distinct ones).

The product of its (nonzero) digits is 32659200, while the sum is 63.

The spelling of 259968305781 in words is "two hundred fifty-nine billion, nine hundred sixty-eight million, three hundred five thousand, seven hundred eighty-one".