26436561 has 8 divisors (see below), whose sum is σ = 35432160. Its totient is φ = 17532672.

The previous prime is 26436539. The next prime is 26436569. The reversal of 26436561 is 16563462.

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

It is not a de Polignac number, because 26436561 - 2⁷ = 26436433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26436569) 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, 22251 + ... + 23408.

It is an arithmetic number, because the mean of its divisors is an integer number (4429020).

Almost surely, 2^26436561 is an apocalyptic number.

It is an amenable number.

26436561 is a deficient number, since it is larger than the sum of its proper divisors (8995599).

26436561 is a wasteful number, since it uses less digits than its factorization.

It is an anagram of its base 9 representation: 26436561 = (54663126)₉.

26436561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45855.

The product of its digits is 25920, while the sum is 33.

The square root of 26436561 is about 5141.6496380053. The cubic root of 26436561 is about 297.8985022869.

The spelling of 26436561 in words is "twenty-six million, four hundred thirty-six thousand, five hundred sixty-one".