266281880237952 has 1024 divisors, whose sum is σ = 789313736540160. Its totient is φ = 79267483975680.

The previous prime is 266281880237951. The next prime is 266281880237959. The reversal of 266281880237952 is 259732088182662.

It is a super-2 number, since 2×266281880237952² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (69).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266281880237951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 243624775518 + ... + 243624776610.

It is an arithmetic number, because the mean of its divisors is an integer number (770814195840).

Almost surely, 2^{266281880237952} 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 266281880237952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (394656868270080).

266281880237952 is an abundant number, since it is smaller than the sum of its proper divisors (523031856302208).

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

266281880237952 is a wasteful number, since it uses less digits than its factorization.

266281880237952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1483 (or 1471 counting only the distinct ones).

The product of its (nonzero) digits is 278691840, while the sum is 69.

The spelling of 266281880237952 in words is "two hundred sixty-six trillion, two hundred eighty-one billion, eight hundred eighty million, two hundred thirty-seven thousand, nine hundred fifty-two".