265509410880 has 448 divisors, whose sum is σ = 1073789429760. Its totient is φ = 54111338496.

The previous prime is 265509410869. The next prime is 265509410927. The reversal of 265509410880 is 88014905562.

It is a tau number, because it is divible by the number of its divisors (448).

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2109399 + ... + 2231721.

Almost surely, 2^265509410880 is an apocalyptic number.

265509410880 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 265509410880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (536894714880).

265509410880 is an abundant number, since it is smaller than the sum of its proper divisors (808280018880).

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

265509410880 is a wasteful number, since it uses less digits than its factorization.

265509410880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122386 (or 122376 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 48.

The spelling of 265509410880 in words is "two hundred sixty-five billion, five hundred nine million, four hundred ten thousand, eight hundred eighty".