5481638643 has 64 divisors (see below), whose sum is σ = 8624537600. Its totient is φ = 3066698880.

The previous prime is 5481638641. The next prime is 5481638671. The reversal of 5481638643 is 3468361845.

It is not a de Polignac number, because 5481638643 - 2¹ = 5481638641 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5481638592 and 5481638601.

It is not an unprimeable number, because it can be changed into a prime (5481638641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2916378 + ... + 2918256.

It is an arithmetic number, because the mean of its divisors is an integer number (134758400).

Almost surely, 2^5481638643 is an apocalyptic number.

5481638643 is a deficient number, since it is larger than the sum of its proper divisors (3142898957).

5481638643 is a wasteful number, since it uses less digits than its factorization.

5481638643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2072.

The product of its digits is 1658880, while the sum is 48.

The square root of 5481638643 is about 74038.0891366059. The cubic root of 5481638643 is about 1763.2076750955.

The spelling of 5481638643 in words is "five billion, four hundred eighty-one million, six hundred thirty-eight thousand, six hundred forty-three".