266189439432 has 128 divisors (see below), whose sum is σ = 779448096000. Its totient is φ = 74165145600.

The previous prime is 266189439431. The next prime is 266189439449. The reversal of 266189439432 is 234934981662.

266189439432 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (266189439431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17549932 + ... + 17565092.

It is an arithmetic number, because the mean of its divisors is an integer number (6089438250).

Almost surely, 2^266189439432 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 266189439432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (389724048000).

266189439432 is an abundant number, since it is smaller than the sum of its proper divisors (513258656568).

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

266189439432 is a wasteful number, since it uses less digits than its factorization.

266189439432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17767 (or 17763 counting only the distinct ones).

The product of its digits is 13436928, while the sum is 57.

The spelling of 266189439432 in words is "two hundred sixty-six billion, one hundred eighty-nine million, four hundred thirty-nine thousand, four hundred thirty-two".