240861206321 has 8 divisors (see below), whose sum is σ = 250150421160. Its totient is φ = 231718278528.

The previous prime is 240861206309. The next prime is 240861206371. The reversal of 240861206321 is 123602168042.

It can be written as a sum of positive squares in 4 ways, for example, as 18039444721 + 222821761600 = 134311^2 + 472040^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-240861206321 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (240861206371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36568406 + ... + 36574991.

It is an arithmetic number, because the mean of its divisors is an integer number (31268802645).

Almost surely, 2^240861206321 is an apocalyptic number.

It is an amenable number.

240861206321 is a deficient number, since it is larger than the sum of its proper divisors (9289214839).

240861206321 is an equidigital number, since it uses as much as digits as its factorization.

240861206321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73143523.

The product of its (nonzero) digits is 27648, while the sum is 35.

The spelling of 240861206321 in words is "two hundred forty billion, eight hundred sixty-one million, two hundred six thousand, three hundred twenty-one".