262641664 has 48 divisors (see below), whose sum is σ = 528255000. Its totient is φ = 130547712.

The previous prime is 262641649. The next prime is 262641667. The reversal of 262641664 is 466146262.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (262641667) 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, 526087 + ... + 526585.

Almost surely, 2^262641664 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 262641664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (264127500).

262641664 is an abundant number, since it is smaller than the sum of its proper divisors (265613336).

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

262641664 is an equidigital number, since it uses as much as digits as its factorization.

262641664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778 (or 758 counting only the distinct ones).

The product of its digits is 82944, while the sum is 37.

The square root of 262641664 is about 16206.2230022914. The cubic root of 262641664 is about 640.4047439809.

The spelling of 262641664 in words is "two hundred sixty-two million, six hundred forty-one thousand, six hundred sixty-four".