265925967840 has 960 divisors, whose sum is σ = 1074528322560. Its totient is φ = 61451550720.

The previous prime is 265925967829. The next prime is 265925967863. The reversal of 265925967840 is 48769529562.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 180778305 + ... + 180779775.

It is an arithmetic number, because the mean of its divisors is an integer number (1119300336).

Almost surely, 2^265925967840 is an apocalyptic number.

265925967840 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 265925967840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (537264161280).

265925967840 is an abundant number, since it is smaller than the sum of its proper divisors (808602354720).

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

265925967840 is a wasteful number, since it uses less digits than its factorization.

265925967840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1577 (or 1560 counting only the distinct ones).

The product of its (nonzero) digits is 65318400, while the sum is 63.

The spelling of 265925967840 in words is "two hundred sixty-five billion, nine hundred twenty-five million, nine hundred sixty-seven thousand, eight hundred forty".