243640120624 has 60 divisors (see below), whose sum is σ = 481892578776. Its totient is φ = 119331536896.

The previous prime is 243640120621. The next prime is 243640120663. The reversal of 243640120624 is 426021046342.

It is a self number, because there is not a number n which added to its sum of digits gives 243640120624.

It is not an unprimeable number, because it can be changed into a prime (243640120621) 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 11 ways as a sum of consecutive naturals, for example, 30692784 + ... + 30700720.

Almost surely, 2^243640120624 is an apocalyptic number.

It is an amenable number.

243640120624 is a deficient number, since it is larger than the sum of its proper divisors (238252458152).

243640120624 is an equidigital number, since it uses as much as digits as its factorization.

243640120624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8734 (or 8675 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 34.

Adding to 243640120624 its reverse (426021046342), we get a palindrome (669661166966).

The spelling of 243640120624 in words is "two hundred forty-three billion, six hundred forty million, one hundred twenty thousand, six hundred twenty-four".