26561957 has 8 divisors (see below), whose sum is σ = 27250560. Its totient is φ = 25880400.

The previous prime is 26561929. The next prime is 26561959. The reversal of 26561957 is 75916562.

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 26561957 - 2²⁰ = 25513381 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 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, 6344 + ... + 9662.

It is an arithmetic number, because the mean of its divisors is an integer number (3406320).

Almost surely, 2^26561957 is an apocalyptic number.

It is an amenable number.

26561957 is a deficient number, since it is larger than the sum of its proper divisors (688603).

26561957 is a wasteful number, since it uses less digits than its factorization.

26561957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3523.

The product of its digits is 113400, while the sum is 41.

The square root of 26561957 is about 5153.8293530151. The cubic root of 26561957 is about 298.3687648343.

The spelling of 26561957 in words is "twenty-six million, five hundred sixty-one thousand, nine hundred fifty-seven".