243005365557656 has 16 divisors (see below), whose sum is σ = 490683911222400. Its totient is φ = 112156322565024.

The previous prime is 243005365557599. The next prime is 243005365557659. The reversal of 243005365557656 is 656755563500342.

It is a happy number.

It is a Smith number, since the sum of its digits (62) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243005365557659) 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, 1168295026616 + ... + 1168295026823.

It is an arithmetic number, because the mean of its divisors is an integer number (30667744451400).

Almost surely, 2^{243005365557656} is an apocalyptic number.

243005365557656 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

243005365557656 is an abundant number, since it is smaller than the sum of its proper divisors (247678545664744).

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

243005365557656 is a wasteful number, since it uses less digits than its factorization.

243005365557656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2336590053458 (or 2336590053454 counting only the distinct ones).

The product of its (nonzero) digits is 340200000, while the sum is 62.

The spelling of 243005365557656 in words is "two hundred forty-three trillion, five billion, three hundred sixty-five million, five hundred fifty-seven thousand, six hundred fifty-six".