243056643155 has 8 divisors (see below), whose sum is σ = 291675225984. Its totient is φ = 194440478400.

The previous prime is 243056643143. The next prime is 243056643173. The reversal of 243056643155 is 551346650342.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 243056643155 - 2⁶ = 243056643091 is a prime.

It is a Duffinian number.

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, 375491 + ... + 791900.

It is an arithmetic number, because the mean of its divisors is an integer number (36459403248).

Almost surely, 2^243056643155 is an apocalyptic number.

243056643155 is a deficient number, since it is larger than the sum of its proper divisors (48618582829).

243056643155 is a wasteful number, since it uses less digits than its factorization.

243056643155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1209037.

The product of its (nonzero) digits is 1296000, while the sum is 44.

The spelling of 243056643155 in words is "two hundred forty-three billion, fifty-six million, six hundred forty-three thousand, one hundred fifty-five".