26725745993 has 4 divisors (see below), whose sum is σ = 26726477700. Its totient is φ = 26725014288.

The previous prime is 26725745939. The next prime is 26725746023. The reversal of 26725745993 is 39954752762.

It is a happy number.

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 16442163529 + 10283582464 = 128227^2 + 101408^2 .

It is a cyclic number.

It is not a de Polignac number, because 26725745993 - 2²⁶ = 26658637129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26725745903) 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, 308018 + ... + 385131.

It is an arithmetic number, because the mean of its divisors is an integer number (6681619425).

Almost surely, 2^26725745993 is an apocalyptic number.

It is an amenable number.

26725745993 is a deficient number, since it is larger than the sum of its proper divisors (731707).

26725745993 is an equidigital number, since it uses as much as digits as its factorization.

26725745993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731706.

The product of its digits is 28576800, while the sum is 59.

The spelling of 26725745993 in words is "twenty-six billion, seven hundred twenty-five million, seven hundred forty-five thousand, nine hundred ninety-three".