26328161081 has 4 divisors (see below), whose sum is σ = 26328872064. Its totient is φ = 26327450100.

The previous prime is 26328161071. The next prime is 26328161107. The reversal of 26328161081 is 18016182362.

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 26328161081 - 2¹⁰ = 26328160057 is a prime.

It is a super-2 number, since 2×26328161081² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26328161021) 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, 296705 + ... + 375086.

It is an arithmetic number, because the mean of its divisors is an integer number (6582218016).

Almost surely, 2^26328161081 is an apocalyptic number.

It is an amenable number.

26328161081 is a deficient number, since it is larger than the sum of its proper divisors (710983).

26328161081 is an equidigital number, since it uses as much as digits as its factorization.

26328161081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 710982.

The product of its (nonzero) digits is 27648, while the sum is 38.

The spelling of 26328161081 in words is "twenty-six billion, three hundred twenty-eight million, one hundred sixty-one thousand, eighty-one".