26781161 has 8 divisors (see below), whose sum is σ = 29271648. Its totient is φ = 24300000.

The previous prime is 26781149. The next prime is 26781163. The reversal of 26781161 is 16118762.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26781161 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (26781163) 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, 4586 + ... + 8636.

It is an arithmetic number, because the mean of its divisors is an integer number (3658956).

Almost surely, 2^26781161 is an apocalyptic number.

It is an amenable number.

26781161 is a deficient number, since it is larger than the sum of its proper divisors (2490487).

26781161 is a wasteful number, since it uses less digits than its factorization.

26781161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4663.

The product of its digits is 4032, while the sum is 32.

The square root of 26781161 is about 5175.0517871805. The cubic root of 26781161 is about 299.1872854904.

It can be divided in two parts, 26 and 781161, that added together give a palindrome (781187).

The spelling of 26781161 in words is "twenty-six million, seven hundred eighty-one thousand, one hundred sixty-one".