266444250105040 has 320 divisors, whose sum is σ = 732727593861120. Its totient is φ = 88174801152000.

The previous prime is 266444250105031. The next prime is 266444250105149. The reversal of 266444250105040 is 40501052444662.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12182525305 + ... + 12182547175.

It is an arithmetic number, because the mean of its divisors is an integer number (2289773730816).

Almost surely, 2^{266444250105040} is an apocalyptic number.

266444250105040 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 266444250105040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (366363796930560).

266444250105040 is an abundant number, since it is smaller than the sum of its proper divisors (466283343756080).

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

266444250105040 is a wasteful number, since it uses less digits than its factorization.

266444250105040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23722 (or 23716 counting only the distinct ones).

The product of its (nonzero) digits is 921600, while the sum is 43.

The spelling of 266444250105040 in words is "two hundred sixty-six trillion, four hundred forty-four billion, two hundred fifty million, one hundred five thousand, forty".