240564510506765 has 4 divisors (see below), whose sum is σ = 288677412608124. Its totient is φ = 192451608405408.

The previous prime is 240564510506753. The next prime is 240564510506767. The reversal of 240564510506765 is 567605015465042.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 138442450548649 + 102122059958116 = 11766157^2 + 10105546^2 .

It is a cyclic number.

It is not a de Polignac number, because 240564510506765 - 2⁶ = 240564510506701 is a prime.

It is a super-2 number, since 2×240564510506765² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 240564510506765.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240564510506767) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24056451050672 + ... + 24056451050681.

It is an arithmetic number, because the mean of its divisors is an integer number (72169353152031).

Almost surely, 2^{240564510506765} is an apocalyptic number.

It is an amenable number.

240564510506765 is a deficient number, since it is larger than the sum of its proper divisors (48112902101359).

240564510506765 is an equidigital number, since it uses as much as digits as its factorization.

240564510506765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48112902101358.

The product of its (nonzero) digits is 30240000, while the sum is 56.

The spelling of 240564510506765 in words is "two hundred forty trillion, five hundred sixty-four billion, five hundred ten million, five hundred six thousand, seven hundred sixty-five".