261168769 has 8 divisors (see below), whose sum is σ = 271720448. Its totient is φ = 250750080.

The previous prime is 261168689. The next prime is 261168779. The reversal of 261168769 is 967861162.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 261168769 - 2¹⁹ = 260644481 is a prime.

It is a super-2 number, since 2×261168769² = 136418251801950722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261168779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29232 + ... + 37105.

It is an arithmetic number, because the mean of its divisors is an integer number (33965056).

Almost surely, 2^261168769 is an apocalyptic number.

It is an amenable number.

261168769 is a deficient number, since it is larger than the sum of its proper divisors (10551679).

261168769 is a wasteful number, since it uses less digits than its factorization.

261168769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66495.

The product of its digits is 217728, while the sum is 46.

The square root of 261168769 is about 16160.7168467243. The cubic root of 261168769 is about 639.2053687657.

The spelling of 261168769 in words is "two hundred sixty-one million, one hundred sixty-eight thousand, seven hundred sixty-nine".