26820870065 has 8 divisors (see below), whose sum is σ = 35110957248. Its totient is φ = 19506087280.

The previous prime is 26820870061. The next prime is 26820870133. The reversal of 26820870065 is 56007802862.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 26820870065 - 2² = 26820870061 is a prime.

It is a super-2 number, since 2×26820870065² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 26820869998 and 26820870025.

It is not an unprimeable number, because it can be changed into a prime (26820870061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 243826037 + ... + 243826146.

It is an arithmetic number, because the mean of its divisors is an integer number (4388869656).

Almost surely, 2^26820870065 is an apocalyptic number.

It is an amenable number.

26820870065 is a deficient number, since it is larger than the sum of its proper divisors (8290087183).

26820870065 is a wasteful number, since it uses less digits than its factorization.

26820870065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487652199.

The product of its (nonzero) digits is 322560, while the sum is 44.

The spelling of 26820870065 in words is "twenty-six billion, eight hundred twenty million, eight hundred seventy thousand, sixty-five".