26181641 has 4 divisors (see below), whose sum is σ = 26195712. Its totient is φ = 26167572.

The previous prime is 26181637. The next prime is 26181643. The reversal of 26181641 is 14618162.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 26181641 - 2² = 26181637 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26181643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3725 + ... + 8138.

It is an arithmetic number, because the mean of its divisors is an integer number (6548928).

Almost surely, 2^26181641 is an apocalyptic number.

It is an amenable number.

26181641 is a deficient number, since it is larger than the sum of its proper divisors (14071).

26181641 is a wasteful number, since it uses less digits than its factorization.

26181641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14070.

The product of its digits is 2304, while the sum is 29.

The square root of 26181641 is about 5116.7998788305. The cubic root of 26181641 is about 296.9378920643.

The spelling of 26181641 in words is "twenty-six million, one hundred eighty-one thousand, six hundred forty-one".