26780008763 has 4 divisors (see below), whose sum is σ = 26796369600. Its totient is φ = 26763647928.

The previous prime is 26780008751. The next prime is 26780008771. The reversal of 26780008763 is 36780008762.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 26780008763 - 2⁴ = 26780008747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26780008363) 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, 8177963 + ... + 8181236.

It is an arithmetic number, because the mean of its divisors is an integer number (6699092400).

Almost surely, 2^26780008763 is an apocalyptic number.

26780008763 is a deficient number, since it is larger than the sum of its proper divisors (16360837).

26780008763 is a wasteful number, since it uses less digits than its factorization.

26780008763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16360836.

The product of its (nonzero) digits is 677376, while the sum is 47.

Subtracting 26780008763 from its reverse (36780008762), we obtain a palindrome (9999999999).

The spelling of 26780008763 in words is "twenty-six billion, seven hundred eighty million, eight thousand, seven hundred sixty-three".