265240673280 has 1056 divisors, whose sum is σ = 1053023307840. Its totient is φ = 63258624000.

The previous prime is 265240673249. The next prime is 265240673317. The reversal of 265240673280 is 82376042562.

265240673280 is a `hidden beast` number, since 2 + 65 + 240 + 6 + 73 + 280 = 666.

It is a tau number, because it is divible by the number of its divisors (1056).

It is a super-2 number, since 2×265240673280² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 95 ways as a sum of consecutive naturals, for example, 1689430962 + ... + 1689431118.

Almost surely, 2^265240673280 is an apocalyptic number.

265240673280 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 265240673280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (526511653920).

265240673280 is an abundant number, since it is smaller than the sum of its proper divisors (787782634560).

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

265240673280 is a wasteful number, since it uses less digits than its factorization.

265240673280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314 (or 279 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 45.

The spelling of 265240673280 in words is "two hundred sixty-five billion, two hundred forty million, six hundred seventy-three thousand, two hundred eighty".