265404764240 has 240 divisors, whose sum is σ = 783771085440. Its totient is φ = 82649226240.

The previous prime is 265404764237. The next prime is 265404764263. The reversal of 265404764240 is 42467404562.

265404764240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 265404764191 and 265404764200.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 66532166 + ... + 66536154.

It is an arithmetic number, because the mean of its divisors is an integer number (3265712856).

Almost surely, 2^265404764240 is an apocalyptic number.

265404764240 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 265404764240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (391885542720).

265404764240 is an abundant number, since it is smaller than the sum of its proper divisors (518366321200).

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

265404764240 is a wasteful number, since it uses less digits than its factorization.

265404764240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5570 (or 5557 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 44.

The spelling of 265404764240 in words is "two hundred sixty-five billion, four hundred four million, seven hundred sixty-four thousand, two hundred forty".