265281440920 has 128 divisors (see below), whose sum is σ = 608290300800. Its totient is φ = 104108544000.

The previous prime is 265281440911. The next prime is 265281440929. The reversal of 265281440920 is 29044182562.

It is an interprime number because it is at equal distance from previous prime (265281440911) and next prime (265281440929).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265281440929) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 299076717 + ... + 299077603.

It is an arithmetic number, because the mean of its divisors is an integer number (4752267975).

Almost surely, 2^265281440920 is an apocalyptic number.

265281440920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

265281440920 is an abundant number, since it is smaller than the sum of its proper divisors (343008859880).

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

265281440920 is a wasteful number, since it uses less digits than its factorization.

265281440920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1589 (or 1585 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 43.

The spelling of 265281440920 in words is "two hundred sixty-five billion, two hundred eighty-one million, four hundred forty thousand, nine hundred twenty".