26646633243 has 6 divisors (see below), whose sum is σ = 38489581364. Its totient is φ = 17764422156.

The previous prime is 26646633217. The next prime is 26646633259. The reversal of 26646633243 is 34233664662.

26646633243 is a `hidden beast` number, since 2 + 6 + 6 + 4 + 6 + 633 + 2 + 4 + 3 = 666.

It is not a de Polignac number, because 26646633243 - 2⁶ = 26646633179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26646633283) 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 5 ways as a sum of consecutive naturals, for example, 1480368505 + ... + 1480368522.

Almost surely, 2^26646633243 is an apocalyptic number.

26646633243 is a deficient number, since it is larger than the sum of its proper divisors (11842948121).

26646633243 is a wasteful number, since it uses less digits than its factorization.

26646633243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2960737033 (or 2960737030 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 45.

The spelling of 26646633243 in words is "twenty-six billion, six hundred forty-six million, six hundred thirty-three thousand, two hundred forty-three".