240321281997839 has 4 divisors (see below), whose sum is σ = 274652893711824. Its totient is φ = 205989670283856.

The previous prime is 240321281997821. The next prime is 240321281997877. The reversal of 240321281997839 is 938799182123042.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-240321281997839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240321281994839) 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, 17165805856982 + ... + 17165805856995.

It is an arithmetic number, because the mean of its divisors is an integer number (68663223427956).

Almost surely, 2^{240321281997839} is an apocalyptic number.

240321281997839 is a deficient number, since it is larger than the sum of its proper divisors (34331611713985).

240321281997839 is an equidigital number, since it uses as much as digits as its factorization.

240321281997839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34331611713984.

The product of its (nonzero) digits is 94058496, while the sum is 68.

The spelling of 240321281997839 in words is "two hundred forty trillion, three hundred twenty-one billion, two hundred eighty-one million, nine hundred ninety-seven thousand, eight hundred thirty-nine".