4320381655681 has 32 divisors (see below), whose sum is σ = 5630443515648. Its totient is φ = 3217095843840.

The previous prime is 4320381655679. The next prime is 4320381655703. The reversal of 4320381655681 is 1865561830234.

It is a cyclic number.

It is not a de Polignac number, because 4320381655681 - 2¹ = 4320381655679 is a prime.

It is a super-2 number, since 2×4320381655681² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (4320381655621) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41734321 + ... + 41837713.

It is an arithmetic number, because the mean of its divisors is an integer number (175951359864).

Almost surely, 2^{4320381655681} is an apocalyptic number.

It is an amenable number.

4320381655681 is a deficient number, since it is larger than the sum of its proper divisors (1310061859967).

4320381655681 is a wasteful number, since it uses less digits than its factorization.

4320381655681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130441.

The product of its (nonzero) digits is 4147200, while the sum is 52.

The spelling of 4320381655681 in words is "four trillion, three hundred twenty billion, three hundred eighty-one million, six hundred fifty-five thousand, six hundred eighty-one".