26671354609 has 4 divisors (see below), whose sum is σ = 26671757220. Its totient is φ = 26670952000.

The previous prime is 26671354603. The next prime is 26671354667. The reversal of 26671354609 is 90645317662.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90645317662 = 2 ⋅45322658831.

It can be written as a sum of positive squares in 2 ways, for example, as 4422649009 + 22248705600 = 66503^2 + 149160^2 .

It is a cyclic number.

It is not a de Polignac number, because 26671354609 - 2¹³ = 26671346417 is a prime.

It is a super-2 number, since 2×26671354609² (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 (26671354603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75892 + ... + 243109.

It is an arithmetic number, because the mean of its divisors is an integer number (6667939305).

Almost surely, 2^26671354609 is an apocalyptic number.

It is an amenable number.

26671354609 is a deficient number, since it is larger than the sum of its proper divisors (402611).

26671354609 is an equidigital number, since it uses as much as digits as its factorization.

26671354609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402610.

The product of its (nonzero) digits is 1632960, while the sum is 49.

The spelling of 26671354609 in words is "twenty-six billion, six hundred seventy-one million, three hundred fifty-four thousand, six hundred nine".