265566142132240 has 80 divisors (see below), whose sum is σ = 620190035297280. Its totient is φ = 105753631357440.

The previous prime is 265566142132199. The next prime is 265566142132271. The reversal of 265566142132240 is 42231241665562.

It is a tau number, because it is divible by the number of its divisors (80).

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 15 ways as a sum of consecutive naturals, for example, 217894945 + ... + 219110335.

It is an arithmetic number, because the mean of its divisors is an integer number (7752375441216).

Almost surely, 2^{265566142132240} is an apocalyptic number.

265566142132240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

265566142132240 is an abundant number, since it is smaller than the sum of its proper divisors (354623893165040).

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

265566142132240 is a wasteful number, since it uses less digits than its factorization.

265566142132240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1227560 (or 1227554 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 49.

The spelling of 265566142132240 in words is "two hundred sixty-five trillion, five hundred sixty-six billion, one hundred forty-two million, one hundred thirty-two thousand, two hundred forty".