4387684644081 has 24 divisors (see below), whose sum is σ = 6463056163200. Its totient is φ = 2867777078976.

The previous prime is 4387684643941. The next prime is 4387684644127. The reversal of 4387684644081 is 1804464867834.

4387684644081 is a `hidden beast` number, since 4 + 3 + 8 + 76 + 8 + 46 + 440 + 81 = 666.

It is not a de Polignac number, because 4387684644081 - 2⁹ = 4387684643569 is a prime.

It is a super-2 number, since 2×4387684644081² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (4387684649081) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19885381 + ... + 20104818.

It is an arithmetic number, because the mean of its divisors is an integer number (269294006800).

Almost surely, 2^{4387684644081} is an apocalyptic number.

It is an amenable number.

4387684644081 is a deficient number, since it is larger than the sum of its proper divisors (2075371519119).

4387684644081 is a wasteful number, since it uses less digits than its factorization.

4387684644081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39990445 (or 39990442 counting only the distinct ones).

The product of its (nonzero) digits is 99090432, while the sum is 63.

The spelling of 4387684644081 in words is "four trillion, three hundred eighty-seven billion, six hundred eighty-four million, six hundred forty-four thousand, eighty-one".