240564401281 has 8 divisors (see below), whose sum is σ = 242114241960. Its totient is φ = 239014783488.

The previous prime is 240564401279. The next prime is 240564401293. The reversal of 240564401281 is 182104465042.

It can be written as a sum of positive squares in 4 ways, for example, as 7680944881 + 232883456400 = 87641^2 + 482580^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 240564401281 - 2¹ = 240564401279 is a prime.

It is a super-2 number, since 2×240564401281² (a number of 24 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 240564401281.

It is not an unprimeable number, because it can be changed into a prime (240564401221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2479635 + ... + 2574823.

It is an arithmetic number, because the mean of its divisors is an integer number (30264280245).

Almost surely, 2^240564401281 is an apocalyptic number.

It is an amenable number.

240564401281 is a deficient number, since it is larger than the sum of its proper divisors (1549840679).

240564401281 is a wasteful number, since it uses less digits than its factorization.

240564401281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111443.

The product of its (nonzero) digits is 61440, while the sum is 37.

The spelling of 240564401281 in words is "two hundred forty billion, five hundred sixty-four million, four hundred one thousand, two hundred eighty-one".