26783944489 has 4 divisors (see below), whose sum is σ = 26784276480. Its totient is φ = 26783612500.

The previous prime is 26783944471. The next prime is 26783944511. The reversal of 26783944489 is 98444938762.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 98444938762 = 2 ⋅49222469381.

It is a cyclic number.

It is not a de Polignac number, because 26783944489 - 2¹³ = 26783936297 is a prime.

It is a super-2 number, since 2×26783944489² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 26783944489.

It is not an unprimeable number, because it can be changed into a prime (26703944489) 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, 41364 + ... + 235114.

It is an arithmetic number, because the mean of its divisors is an integer number (6696069120).

Almost surely, 2^26783944489 is an apocalyptic number.

It is an amenable number.

26783944489 is a deficient number, since it is larger than the sum of its proper divisors (331991).

26783944489 is a wasteful number, since it uses less digits than its factorization.

26783944489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331990.

The product of its digits is 83607552, while the sum is 64.

The spelling of 26783944489 in words is "twenty-six billion, seven hundred eighty-three million, nine hundred forty-four thousand, four hundred eighty-nine".