26396326656 has 540 divisors, whose sum is σ = 92958703992. Its totient is φ = 7427137536.

The previous prime is 26396326639. The next prime is 26396326657. The reversal of 26396326656 is 65662369362.

26396326656 is a `hidden beast` number, since 263 + 9 + 6 + 326 + 6 + 56 = 666.

It is a super-2 number, since 2×26396326656² (a number of 22 digits) contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26396326657) 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 59 ways as a sum of consecutive naturals, for example, 84333156 + ... + 84333468.

Almost surely, 2^26396326656 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 26396326656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46479351996).

26396326656 is an abundant number, since it is smaller than the sum of its proper divisors (66562377336).

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

26396326656 is an equidigital number, since it uses as much as digits as its factorization.

26396326656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438 (or 408 counting only the distinct ones).

The product of its digits is 12597120, while the sum is 54.

The spelling of 26396326656 in words is "twenty-six billion, three hundred ninety-six million, three hundred twenty-six thousand, six hundred fifty-six".