266138748288 has 384 divisors, whose sum is σ = 897676116480. Its totient is φ = 74099515392.

The previous prime is 266138748277. The next prime is 266138748307. The reversal of 266138748288 is 882847831662.

266138748288 is a `hidden beast` number, since 2 + 6 + 613 + 8 + 7 + 4 + 8 + 2 + 8 + 8 = 666.

266138748288 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (384).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 257636220 + ... + 257637252.

It is an arithmetic number, because the mean of its divisors is an integer number (2337698220).

Almost surely, 2^266138748288 is an apocalyptic number.

266138748288 is a gapful number since it is divisible by the number (28) 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 266138748288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (448838058240).

266138748288 is an abundant number, since it is smaller than the sum of its proper divisors (631537368192).

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

266138748288 is a wasteful number, since it uses less digits than its factorization.

266138748288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1846 (or 1831 counting only the distinct ones).

The product of its digits is 49545216, while the sum is 63.

The spelling of 266138748288 in words is "two hundred sixty-six billion, one hundred thirty-eight million, seven hundred forty-eight thousand, two hundred eighty-eight".