266231054651536 has 80 divisors (see below), whose sum is σ = 562420570748400. Its totient is φ = 121348680228864.

The previous prime is 266231054651521. The next prime is 266231054651539. The reversal of 266231054651536 is 635156450132662.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 17305966081936 + 248925088569600 = 4160044^2 + 15777360^2 .

It is not an unprimeable number, because it can be changed into a prime (266231054651539) 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, 6672420 + ... + 24020476.

It is an arithmetic number, because the mean of its divisors is an integer number (7030257134355).

Almost surely, 2^{266231054651536} is an apocalyptic number.

266231054651536 is a gapful number since it is divisible by the number (26) 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 266231054651536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (281210285374200).

266231054651536 is an abundant number, since it is smaller than the sum of its proper divisors (296189516096864).

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

266231054651536 is a wasteful number, since it uses less digits than its factorization.

266231054651536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17348996 (or 17348990 counting only the distinct ones).

The product of its (nonzero) digits is 23328000, while the sum is 55.

The spelling of 266231054651536 in words is "two hundred sixty-six trillion, two hundred thirty-one billion, fifty-four million, six hundred fifty-one thousand, five hundred thirty-six".