243515345440 has 48 divisors (see below), whose sum is σ = 579443941440. Its totient is φ = 96705365760.

The previous prime is 243515345371. The next prime is 243515345459. The reversal of 243515345440 is 44543515342.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 243515345393 and 243515345402.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5452476 + ... + 5496955.

It is an arithmetic number, because the mean of its divisors is an integer number (12071748780).

Almost surely, 2^243515345440 is an apocalyptic number.

243515345440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243515345440 is an abundant number, since it is smaller than the sum of its proper divisors (335928596000).

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

243515345440 is a wasteful number, since it uses less digits than its factorization.

243515345440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10949585 (or 10949577 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 40.

The spelling of 243515345440 in words is "two hundred forty-three billion, five hundred fifteen million, three hundred forty-five thousand, four hundred forty".