264427841538 has 144 divisors (see below), whose sum is σ = 706117294584. Its totient is φ = 71061580800.

The previous prime is 264427841533. The next prime is 264427841539. The reversal of 264427841538 is 835148724462.

264427841538 is a `hidden beast` number, since 2 + 6 + 4 + 4 + 27 + 84 + 1 + 538 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 238531629609 + 25896211929 = 488397^2 + 160923^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (264427841533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 28498956 + ... + 28508232.

Almost surely, 2^264427841538 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 264427841538, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (353058647292).

264427841538 is an abundant number, since it is smaller than the sum of its proper divisors (441689453046).

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

264427841538 is a wasteful number, since it uses less digits than its factorization.

264427841538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11217 (or 11207 counting only the distinct ones).

The product of its digits is 10321920, while the sum is 54.

The spelling of 264427841538 in words is "two hundred sixty-four billion, four hundred twenty-seven million, eight hundred forty-one thousand, five hundred thirty-eight".