266243551063540 has 48 divisors (see below), whose sum is σ = 583422675962112. Its totient is φ = 101866744238336.

The previous prime is 266243551063481. The next prime is 266243551063549. The reversal of 266243551063540 is 45360155342662.

266243551063540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266243551063549) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 159533697 + ... + 161193943.

It is an arithmetic number, because the mean of its divisors is an integer number (12154639082544).

Almost surely, 2^{266243551063540} is an apocalyptic number.

266243551063540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266243551063540 is an abundant number, since it is smaller than the sum of its proper divisors (317179124898572).

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

266243551063540 is a wasteful number, since it uses less digits than its factorization.

266243551063540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2008896 (or 2008894 counting only the distinct ones).

The product of its (nonzero) digits is 15552000, while the sum is 52.

The spelling of 266243551063540 in words is "two hundred sixty-six trillion, two hundred forty-three billion, five hundred fifty-one million, sixty-three thousand, five hundred forty".