243661662105 has 16 divisors (see below), whose sum is σ = 389940181440. Its totient is φ = 129925712448.

The previous prime is 243661662067. The next prime is 243661662109. The reversal of 243661662105 is 501266166342.

It is not a de Polignac number, because 243661662105 - 2⁷ = 243661661977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (243661662109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1624147 + ... + 1767816.

It is an arithmetic number, because the mean of its divisors is an integer number (24371261340).

Almost surely, 2^243661662105 is an apocalyptic number.

It is an amenable number.

243661662105 is a deficient number, since it is larger than the sum of its proper divisors (146278519335).

243661662105 is a wasteful number, since it uses less digits than its factorization.

243661662105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3396760.

The product of its (nonzero) digits is 311040, while the sum is 42.

The spelling of 243661662105 in words is "two hundred forty-three billion, six hundred sixty-one million, six hundred sixty-two thousand, one hundred five".