4043663668242 has 60 divisors (see below), whose sum is σ = 9959393897838. Its totient is φ = 1225352620800.

The previous prime is 4043663668199. The next prime is 4043663668277. The reversal of 4043663668242 is 2428663663404.

4043663668242 is a `hidden beast` number, since 4 + 0 + 4 + 36 + 6 + 366 + 8 + 242 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3081320326161 + 962343342081 = 1755369^2 + 980991^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 103124559 + ... + 103163762.

Almost surely, 2^{4043663668242} is an apocalyptic number.

4043663668242 is an abundant number, since it is smaller than the sum of its proper divisors (5915730229596).

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

4043663668242 is a wasteful number, since it uses less digits than its factorization.

4043663668242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206288357 (or 206288337 counting only the distinct ones).

The product of its (nonzero) digits is 23887872, while the sum is 54.

The spelling of 4043663668242 in words is "four trillion, forty-three billion, six hundred sixty-three million, six hundred sixty-eight thousand, two hundred forty-two".