265243135665240 has 96 divisors (see below), whose sum is σ = 862326491410800. Its totient is φ = 70708011521280.

The previous prime is 265243135665197. The next prime is 265243135665371. The reversal of 265243135665240 is 42566531342562.

265243135665240 is a `hidden beast` number, since 2 + 6 + 5 + 2 + 4 + 31 + 3 + 566 + 5 + 2 + 40 = 666.

265243135665240 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 121265175 + ... + 123433094.

Almost surely, 2^{265243135665240} is an apocalyptic number.

265243135665240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

265243135665240 is an abundant number, since it is smaller than the sum of its proper divisors (597083355745560).

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

265243135665240 is a wasteful number, since it uses less digits than its factorization.

265243135665240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244701297 (or 244701290 counting only the distinct ones).

The product of its (nonzero) digits is 31104000, while the sum is 54.

The spelling of 265243135665240 in words is "two hundred sixty-five trillion, two hundred forty-three billion, one hundred thirty-five million, six hundred sixty-five thousand, two hundred forty".