26561951 has 8 divisors (see below), whose sum is σ = 28734384. Its totient is φ = 24408000.

The previous prime is 26561929. The next prime is 26561959. The reversal of 26561951 is 15916562.

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

It is a cyclic number.

It is not a de Polignac number, because 26561951 - 2¹⁴ = 26545567 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26561959) 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, 1550 + ... + 7451.

It is an arithmetic number, because the mean of its divisors is an integer number (3591798).

Almost surely, 2^26561951 is an apocalyptic number.

26561951 is a deficient number, since it is larger than the sum of its proper divisors (2172433).

26561951 is a wasteful number, since it uses less digits than its factorization.

26561951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9241.

The product of its digits is 16200, while the sum is 35.

The square root of 26561951 is about 5153.8287709236. The cubic root of 26561951 is about 298.3687423684.

The spelling of 26561951 in words is "twenty-six million, five hundred sixty-one thousand, nine hundred fifty-one".