265556241664 has 288 divisors, whose sum is σ = 670644576000. Its totient is φ = 104478474240.

The previous prime is 265556241641. The next prime is 265556241697. The reversal of 265556241664 is 466142655562.

It is a congruent number.

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, 61200007 + ... + 61204345.

It is an arithmetic number, because the mean of its divisors is an integer number (2328627000).

Almost surely, 2^265556241664 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 265556241664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (335322288000).

265556241664 is an abundant number, since it is smaller than the sum of its proper divisors (405088334336).

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

265556241664 is an equidigital number, since it uses as much as digits as its factorization.

265556241664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4434 (or 4406 counting only the distinct ones).

The product of its digits is 10368000, while the sum is 52.

The spelling of 265556241664 in words is "two hundred sixty-five billion, five hundred fifty-six million, two hundred forty-one thousand, six hundred sixty-four".