26681613 has 16 divisors (see below), whose sum is σ = 40820736. Its totient is φ = 15185520.

The previous prime is 26681609. The next prime is 26681621. The reversal of 26681613 is 31618662.

It is not a de Polignac number, because 26681613 - 2² = 26681609 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26681663) 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 15 ways as a sum of consecutive naturals, for example, 3108 + ... + 7938.

It is an arithmetic number, because the mean of its divisors is an integer number (2551296).

Almost surely, 2^26681613 is an apocalyptic number.

It is an amenable number.

26681613 is a deficient number, since it is larger than the sum of its proper divisors (14139123).

26681613 is a wasteful number, since it uses less digits than its factorization.

26681613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5104.

The product of its digits is 10368, while the sum is 33.

The square root of 26681613 is about 5165.4247647217. The cubic root of 26681613 is about 298.8161231531.

The spelling of 26681613 in words is "twenty-six million, six hundred eighty-one thousand, six hundred thirteen".