265263561040 has 40 divisors (see below), whose sum is σ = 627190973280. Its totient is φ = 104307025536.

The previous prime is 265263560957. The next prime is 265263561047. The reversal of 265263561040 is 40165362562.

It is a happy number.

265263561040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 265263560984 and 265263561002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265263561047) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 28095234 + ... + 28104673.

It is an arithmetic number, because the mean of its divisors is an integer number (15679774332).

Almost surely, 2^265263561040 is an apocalyptic number.

265263561040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

265263561040 is an abundant number, since it is smaller than the sum of its proper divisors (361927412240).

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

265263561040 is a wasteful number, since it uses less digits than its factorization.

265263561040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56199979 (or 56199973 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 40.

The spelling of 265263561040 in words is "two hundred sixty-five billion, two hundred sixty-three million, five hundred sixty-one thousand, forty".