265646304660 has 192 divisors, whose sum is σ = 834464332800. Its totient is φ = 62595456000.

The previous prime is 265646304647. The next prime is 265646304661. The reversal of 265646304660 is 66403646562.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265646304661) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3427335 + ... + 3503985.

It is an arithmetic number, because the mean of its divisors is an integer number (4346168400).

Almost surely, 2^265646304660 is an apocalyptic number.

265646304660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 265646304660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (417232166400).

265646304660 is an abundant number, since it is smaller than the sum of its proper divisors (568818028140).

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

265646304660 is a wasteful number, since it uses less digits than its factorization.

265646304660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76822 (or 76820 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 48.

The spelling of 265646304660 in words is "two hundred sixty-five billion, six hundred forty-six million, three hundred four thousand, six hundred sixty".