265393840264 has 128 divisors (see below), whose sum is σ = 601675776000. Its totient is φ = 107207864064.

The previous prime is 265393840223. The next prime is 265393840279. The reversal of 265393840264 is 462048393562.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 307524297 + ... + 307525159.

It is an arithmetic number, because the mean of its divisors is an integer number (4700592000).

Almost surely, 2^265393840264 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 265393840264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (300837888000).

265393840264 is an abundant number, since it is smaller than the sum of its proper divisors (336281935736).

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

265393840264 is a wasteful number, since it uses less digits than its factorization.

265393840264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2027 (or 2023 counting only the distinct ones).

The product of its (nonzero) digits is 7464960, while the sum is 52.

The spelling of 265393840264 in words is "two hundred sixty-five billion, three hundred ninety-three million, eight hundred forty thousand, two hundred sixty-four".