265103205640 has 128 divisors (see below), whose sum is σ = 734374690560. Its totient is φ = 83873055744.

The previous prime is 265103205629. The next prime is 265103205677. The reversal of 265103205640 is 46502301562.

265103205640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 265103205596 and 265103205605.

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 31 ways as a sum of consecutive naturals, for example, 12900814 + ... + 12921346.

It is an arithmetic number, because the mean of its divisors is an integer number (5737302270).

Almost surely, 2^265103205640 is an apocalyptic number.

265103205640 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 265103205640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (367187345280).

265103205640 is an abundant number, since it is smaller than the sum of its proper divisors (469271484920).

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

265103205640 is a wasteful number, since it uses less digits than its factorization.

265103205640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24111 (or 24107 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 34.

The spelling of 265103205640 in words is "two hundred sixty-five billion, one hundred three million, two hundred five thousand, six hundred forty".