6543023643 has 32 divisors (see below), whose sum is σ = 10661145600. Its totient is φ = 3940796448.

The previous prime is 6543023629. The next prime is 6543023651. The reversal of 6543023643 is 3463203456.

6543023643 is a `hidden beast` number, since 6 + 5 + 4 + 3 + 0 + 2 + 3 + 643 = 666.

It is not a de Polignac number, because 6543023643 - 2⁵ = 6543023611 is a prime.

It is a super-2 number, since 2×6543023643² = 85622316785713982898, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6543023598 and 6543023607.

It is not an unprimeable number, because it can be changed into a prime (6543023743) 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, 181813 + ... + 214806.

It is an arithmetic number, because the mean of its divisors is an integer number (333160800).

Almost surely, 2^6543023643 is an apocalyptic number.

6543023643 is a deficient number, since it is larger than the sum of its proper divisors (4118121957).

6543023643 is a wasteful number, since it uses less digits than its factorization.

6543023643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396688 (or 396682 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 36.

The square root of 6543023643 is about 80888.9587212000. The cubic root of 6543023643 is about 1870.3641224274.

The spelling of 6543023643 in words is "six billion, five hundred forty-three million, twenty-three thousand, six hundred forty-three".