26385780239 has 64 divisors (see below), whose sum is σ = 34618752000. Its totient is φ = 19957924224.

The previous prime is 26385780227. The next prime is 26385780247. The reversal of 26385780239 is 93208758362.

It is a de Polignac number, because none of the positive numbers 2^k-26385780239 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26385780299) 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 63 ways as a sum of consecutive naturals, for example, 13835324 + ... + 13837230.

It is an arithmetic number, because the mean of its divisors is an integer number (540918000).

Almost surely, 2^26385780239 is an apocalyptic number.

26385780239 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

26385780239 is a deficient number, since it is larger than the sum of its proper divisors (8232971761).

26385780239 is a wasteful number, since it uses less digits than its factorization.

26385780239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2077 (or 2063 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 53.

The spelling of 26385780239 in words is "twenty-six billion, three hundred eighty-five million, seven hundred eighty thousand, two hundred thirty-nine".