264644230145 has 4 divisors (see below), whose sum is σ = 317573076180. Its totient is φ = 211715384112.

The previous prime is 264644230141. The next prime is 264644230211. The reversal of 264644230145 is 541032446462.

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 30629200144 + 234015030001 = 175012^2 + 483751^2 .

It is a cyclic number.

It is not a de Polignac number, because 264644230145 - 2² = 264644230141 is a prime.

It is not an unprimeable number, because it can be changed into a prime (264644230141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26464423010 + ... + 26464423019.

It is an arithmetic number, because the mean of its divisors is an integer number (79393269045).

Almost surely, 2^264644230145 is an apocalyptic number.

It is an amenable number.

264644230145 is a deficient number, since it is larger than the sum of its proper divisors (52928846035).

264644230145 is an equidigital number, since it uses as much as digits as its factorization.

264644230145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52928846034.

The product of its (nonzero) digits is 552960, while the sum is 41.

The spelling of 264644230145 in words is "two hundred sixty-four billion, six hundred forty-four million, two hundred thirty thousand, one hundred forty-five".