26646145 has 4 divisors (see below), whose sum is σ = 31975380. Its totient is φ = 21316912.

The previous prime is 26646131. The next prime is 26646149. The reversal of 26646145 is 54164662.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11209104 + 15437041 = 3348^2 + 3929^2 .

It is a cyclic number.

It is not a de Polignac number, because 26646145 - 2¹⁹ = 26121857 is a prime.

It is a super-2 number, since 2×26646145² = 1420034086722050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 26646145.

It is not an unprimeable number, because it can be changed into a prime (26646149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2664610 + ... + 2664619.

It is an arithmetic number, because the mean of its divisors is an integer number (7993845).

Almost surely, 2^26646145 is an apocalyptic number.

It is an amenable number.

26646145 is a deficient number, since it is larger than the sum of its proper divisors (5329235).

26646145 is an equidigital number, since it uses as much as digits as its factorization.

26646145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5329234.

The product of its digits is 34560, while the sum is 34.

The square root of 26646145 is about 5161.9904106846. The cubic root of 26646145 is about 298.6836585241.

The spelling of 26646145 in words is "twenty-six million, six hundred forty-six thousand, one hundred forty-five".