264644624413 has 4 divisors (see below), whose sum is σ = 285001903228. Its totient is φ = 244287345600.

The previous prime is 264644624401. The next prime is 264644624423. The reversal of 264644624413 is 314426446462.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14607623044 + 250037001369 = 120862^2 + 500037^2 .

It is a cyclic number.

It is not a de Polignac number, because 264644624413 - 2⁵ = 264644624381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (264644624423) 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 3 ways as a sum of consecutive naturals, for example, 10178639388 + ... + 10178639413.

It is an arithmetic number, because the mean of its divisors is an integer number (71250475807).

Almost surely, 2^264644624413 is an apocalyptic number.

It is an amenable number.

264644624413 is a deficient number, since it is larger than the sum of its proper divisors (20357278815).

264644624413 is a wasteful number, since it uses less digits than its factorization.

264644624413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20357278814.

The product of its digits is 2654208, while the sum is 46.

The spelling of 264644624413 in words is "two hundred sixty-four billion, six hundred forty-four million, six hundred twenty-four thousand, four hundred thirteen".