265274818560 has 448 divisors, whose sum is σ = 954967893660. Its totient is φ = 70708101120.

The previous prime is 265274818559. The next prime is 265274818643. The reversal of 265274818560 is 65818472562.

265274818560 is a `hidden beast` number, since 2 + 6 + 5 + 2 + 74 + 8 + 1 + 8 + 560 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 265167323136 + 107495424 = 514944^2 + 10368^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 265274818497 and 265274818506.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 119438250 + ... + 119440470.

Almost surely, 2^265274818560 is an apocalyptic number.

265274818560 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 265274818560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (477483946830).

265274818560 is an abundant number, since it is smaller than the sum of its proper divisors (689693075100).

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

265274818560 is an frugal number, since it uses more digits than its factorization.

265274818560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2274 (or 2231 counting only the distinct ones).

The product of its (nonzero) digits is 6451200, while the sum is 54.

The spelling of 265274818560 in words is "two hundred sixty-five billion, two hundred seventy-four million, eight hundred eighteen thousand, five hundred sixty".