26681457161 has 4 divisors (see below), whose sum is σ = 28085744400. Its totient is φ = 25277169924.

The previous prime is 26681457151. The next prime is 26681457223. The reversal of 26681457161 is 16175418662.

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 26681457161 - 2⁶ = 26681457097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26681457151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 702143591 + ... + 702143628.

It is an arithmetic number, because the mean of its divisors is an integer number (7021436100).

Almost surely, 2^26681457161 is an apocalyptic number.

It is an amenable number.

26681457161 is a deficient number, since it is larger than the sum of its proper divisors (1404287239).

26681457161 is a wasteful number, since it uses less digits than its factorization.

26681457161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1404287238.

The product of its digits is 483840, while the sum is 47.

The spelling of 26681457161 in words is "twenty-six billion, six hundred eighty-one million, four hundred fifty-seven thousand, one hundred sixty-one".