26240442406861 has 8 divisors (see below), whose sum is σ = 26526566460800. Its totient is φ = 25954636802688.

The previous prime is 26240442406721. The next prime is 26240442406889. The reversal of 26240442406861 is 16860424404262.

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 26240442406861 - 2⁹ = 26240442406349 is a prime.

It is a super-2 number, since 2×26240442406861² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26240442106861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79446741 + ... + 79776346.

It is an arithmetic number, because the mean of its divisors is an integer number (3315820807600).

Almost surely, 2^{26240442406861} is an apocalyptic number.

It is an amenable number.

26240442406861 is a deficient number, since it is larger than the sum of its proper divisors (286124053939).

26240442406861 is a wasteful number, since it uses less digits than its factorization.

26240442406861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159224883.

The product of its (nonzero) digits is 3538944, while the sum is 49.

The spelling of 26240442406861 in words is "twenty-six trillion, two hundred forty billion, four hundred forty-two million, four hundred six thousand, eight hundred sixty-one".