243015455440 has 40 divisors (see below), whose sum is σ = 583237099008. Its totient is φ = 94070497920.

The previous prime is 243015455437. The next prime is 243015455443. The reversal of 243015455440 is 44554510342.

It is an interprime number because it is at equal distance from previous prime (243015455437) and next prime (243015455443).

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 243015455440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243015455443) 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, 48992572 + ... + 48997531.

Almost surely, 2^243015455440 is an apocalyptic number.

243015455440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243015455440 is an abundant number, since it is smaller than the sum of its proper divisors (340221643568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

243015455440 is a wasteful number, since it uses less digits than its factorization.

243015455440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97990147 (or 97990141 counting only the distinct ones).

The product of its (nonzero) digits is 192000, while the sum is 37.

Adding to 243015455440 its reverse (44554510342), we get a palindrome (287569965782).

The spelling of 243015455440 in words is "two hundred forty-three billion, fifteen million, four hundred fifty-five thousand, four hundred forty".