264442620263 has 4 divisors (see below), whose sum is σ = 270069059040. Its totient is φ = 258816181488.

The previous prime is 264442620259. The next prime is 264442620269. The reversal of 264442620263 is 362026244462.

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

It is a cyclic number.

It is not a de Polignac number, because 264442620263 - 2² = 264442620259 is a prime.

It is a super-2 number, since 2×264442620263² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 264442620263.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (264442620269) 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, 2813219318 + ... + 2813219411.

It is an arithmetic number, because the mean of its divisors is an integer number (67517264760).

Almost surely, 2^264442620263 is an apocalyptic number.

264442620263 is a deficient number, since it is larger than the sum of its proper divisors (5626438777).

264442620263 is an equidigital number, since it uses as much as digits as its factorization.

264442620263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5626438776.

The product of its (nonzero) digits is 663552, while the sum is 41.

The spelling of 264442620263 in words is "two hundred sixty-four billion, four hundred forty-two million, six hundred twenty thousand, two hundred sixty-three".