26423591945 has 4 divisors (see below), whose sum is σ = 31708310340. Its totient is φ = 21138873552.

The previous prime is 26423591941. The next prime is 26423591983. The reversal of 26423591945 is 54919532462.

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

It can be written as a sum of positive squares in 2 ways, for example, as 19825766416 + 6597825529 = 140804^2 + 81227^2 .

It is a cyclic number.

It is not a de Polignac number, because 26423591945 - 2² = 26423591941 is a prime.

It is a super-2 number, since 2×26423591945² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 26423591893 and 26423591902.

It is not an unprimeable number, because it can be changed into a prime (26423591941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2642359190 + ... + 2642359199.

It is an arithmetic number, because the mean of its divisors is an integer number (7927077585).

Almost surely, 2^26423591945 is an apocalyptic number.

It is an amenable number.

26423591945 is a deficient number, since it is larger than the sum of its proper divisors (5284718395).

26423591945 is an equidigital number, since it uses as much as digits as its factorization.

26423591945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5284718394.

The product of its digits is 2332800, while the sum is 50.

The spelling of 26423591945 in words is "twenty-six billion, four hundred twenty-three million, five hundred ninety-one thousand, nine hundred forty-five".