26405326500 has 384 divisors, whose sum is σ = 96273515520. Its totient is φ = 5483520000.

The previous prime is 26405326499. The next prime is 26405326511. The reversal of 26405326500 is 562350462.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 5173950 + ... + 5179050.

It is an arithmetic number, because the mean of its divisors is an integer number (250712280).

Almost surely, 2^26405326500 is an apocalyptic number.

26405326500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26405326500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48136757760).

26405326500 is an abundant number, since it is smaller than the sum of its proper divisors (69868189020).

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

26405326500 is a wasteful number, since it uses less digits than its factorization.

26405326500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5176 (or 5164 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 33.

Adding to 26405326500 its reverse (562350462), we get a palindrome (26967676962).

The spelling of 26405326500 in words is "twenty-six billion, four hundred five million, three hundred twenty-six thousand, five hundred".