243617465640 has 32 divisors (see below), whose sum is σ = 730852397280. Its totient is φ = 64964657472.

The previous prime is 243617465621. The next prime is 243617465657. The reversal of 243617465640 is 46564716342.

It is a self number, because there is not a number n which added to its sum of digits gives 243617465640.

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, 1015072654 + ... + 1015072893.

It is an arithmetic number, because the mean of its divisors is an integer number (22839137415).

Almost surely, 2^243617465640 is an apocalyptic number.

243617465640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243617465640 is an abundant number, since it is smaller than the sum of its proper divisors (487234931640).

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

243617465640 is a wasteful number, since it uses less digits than its factorization.

243617465640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2030145561 (or 2030145557 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 48.

The spelling of 243617465640 in words is "two hundred forty-three billion, six hundred seventeen million, four hundred sixty-five thousand, six hundred forty".