26391339648 has 448 divisors, whose sum is σ = 84765035520. Its totient is φ = 8151736320.

The previous prime is 26391339599. The next prime is 26391339649. The reversal of 26391339648 is 84693319362.

26391339648 is a `hidden beast` number, since 263 + 9 + 1 + 339 + 6 + 48 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 26391339594 and 26391339603.

It is not an unprimeable number, because it can be changed into a prime (26391339649) 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 55 ways as a sum of consecutive naturals, for example, 201460543 + ... + 201460673.

Almost surely, 2^26391339648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26391339648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42382517760).

26391339648 is an abundant number, since it is smaller than the sum of its proper divisors (58373695872).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26391339648 is a wasteful number, since it uses less digits than its factorization.

26391339648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307 (or 280 counting only the distinct ones).

The product of its digits is 5038848, while the sum is 54.

The spelling of 26391339648 in words is "twenty-six billion, three hundred ninety-one million, three hundred thirty-nine thousand, six hundred forty-eight".