26238599645 has 8 divisors (see below), whose sum is σ = 32254278840. Its totient is φ = 20478906880.

The previous prime is 26238599641. The next prime is 26238599677. The reversal of 26238599645 is 54699583262.

It can be written as a sum of positive squares in 4 ways, for example, as 1530217924 + 24708381721 = 39118^2 + 157189^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 26238599645 - 2² = 26238599641 is a prime.

It is a super-2 number, since 2×26238599645² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26238599641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63996380 + ... + 63996789.

It is an arithmetic number, because the mean of its divisors is an integer number (4031784855).

Almost surely, 2^26238599645 is an apocalyptic number.

It is an amenable number.

26238599645 is a deficient number, since it is larger than the sum of its proper divisors (6015679195).

26238599645 is a wasteful number, since it uses less digits than its factorization.

26238599645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127993215.

The product of its digits is 27993600, while the sum is 59.

The spelling of 26238599645 in words is "twenty-six billion, two hundred thirty-eight million, five hundred ninety-nine thousand, six hundred forty-five".