26172066500 has 48 divisors (see below), whose sum is σ = 57409650480. Its totient is φ = 10423065600.

The previous prime is 26172066451. The next prime is 26172066509. The reversal of 26172066500 is 566027162.

It can be written as a sum of positive squares in 8 ways, for example, as 9379535104 + 16792531396 = 96848^2 + 129586^2 .

It is not an unprimeable number, because it can be changed into a prime (26172066509) 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 15 ways as a sum of consecutive naturals, for example, 212 + ... + 228788.

It is an arithmetic number, because the mean of its divisors is an integer number (1196034385).

Almost surely, 2^26172066500 is an apocalyptic number.

26172066500 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 26172066500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28704825240).

26172066500 is an abundant number, since it is smaller than the sum of its proper divisors (31237583980).

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

26172066500 is a wasteful number, since it uses less digits than its factorization.

26172066500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228825 (or 228813 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 35.

The spelling of 26172066500 in words is "twenty-six billion, one hundred seventy-two million, sixty-six thousand, five hundred".