265780468820 has 48 divisors (see below), whose sum is σ = 565899530448. Its totient is φ = 104834580480.

The previous prime is 265780468787. The next prime is 265780468843. The reversal of 265780468820 is 28864087562.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 4735091344 + 261045377476 = 68812^2 + 510926^2 .

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 15 ways as a sum of consecutive naturals, for example, 8535680 + ... + 8566760.

It is an arithmetic number, because the mean of its divisors is an integer number (11789573551).

Almost surely, 2^265780468820 is an apocalyptic number.

265780468820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

265780468820 is an abundant number, since it is smaller than the sum of its proper divisors (300119061628).

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

265780468820 is a wasteful number, since it uses less digits than its factorization.

265780468820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37020 (or 37018 counting only the distinct ones).

The product of its (nonzero) digits is 10321920, while the sum is 56.

The spelling of 265780468820 in words is "two hundred sixty-five billion, seven hundred eighty million, four hundred sixty-eight thousand, eight hundred twenty".