264013889065 has 4 divisors (see below), whose sum is σ = 316816666884. Its totient is φ = 211211111248.

The previous prime is 264013889059. The next prime is 264013889071. The reversal of 264013889065 is 560988310462.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 560988310462 = 2 ⋅280494155231.

It is an interprime number because it is at equal distance from previous prime (264013889059) and next prime (264013889071).

It can be written as a sum of positive squares in 2 ways, for example, as 204511068441 + 59502820624 = 452229^2 + 243932^2 .

It is a cyclic number.

It is not a de Polignac number, because 264013889065 - 2³ = 264013889057 is a prime.

It is a super-2 number, since 2×264013889065² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26401388902 + ... + 26401388911.

It is an arithmetic number, because the mean of its divisors is an integer number (79204166721).

Almost surely, 2^264013889065 is an apocalyptic number.

It is an amenable number.

264013889065 is a deficient number, since it is larger than the sum of its proper divisors (52802777819).

264013889065 is an equidigital number, since it uses as much as digits as its factorization.

264013889065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52802777818.

The product of its (nonzero) digits is 2488320, while the sum is 52.

The spelling of 264013889065 in words is "two hundred sixty-four billion, thirteen million, eight hundred eighty-nine thousand, sixty-five".