26172645 has 16 divisors (see below), whose sum is σ = 43320960. Its totient is φ = 13477184.

The previous prime is 26172631. The next prime is 26172647. The reversal of 26172645 is 54627162.

It is a cyclic number.

It is not a de Polignac number, because 26172645 - 2⁵ = 26172613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26172647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29649 + ... + 30518.

It is an arithmetic number, because the mean of its divisors is an integer number (2707560).

Almost surely, 2^26172645 is an apocalyptic number.

It is an amenable number.

26172645 is a deficient number, since it is larger than the sum of its proper divisors (17148315).

26172645 is a wasteful number, since it uses less digits than its factorization.

26172645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60204.

The product of its digits is 20160, while the sum is 33.

The square root of 26172645 is about 5115.9207382445. The cubic root of 26172645 is about 296.9038789266.

The spelling of 26172645 in words is "twenty-six million, one hundred seventy-two thousand, six hundred forty-five".