26509961 has 8 divisors (see below), whose sum is σ = 27743040. Its totient is φ = 25283632.

The previous prime is 26509937. The next prime is 26509963. The reversal of 26509961 is 16990562.

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-26509961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26509963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7466 + ... + 10428.

It is an arithmetic number, because the mean of its divisors is an integer number (3467880).

Almost surely, 2^26509961 is an apocalyptic number.

It is an amenable number.

26509961 is a deficient number, since it is larger than the sum of its proper divisors (1233079).

26509961 is a wasteful number, since it uses less digits than its factorization.

26509961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3375.

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 26509961 is about 5148.7824774407. The cubic root of 26509961 is about 298.1739484109.

The spelling of 26509961 in words is "twenty-six million, five hundred nine thousand, nine hundred sixty-one".