643561010151543 has 48 divisors (see below), whose sum is σ = 1018996400602752. Its totient is φ = 388152600696000.

The previous prime is 643561010151533. The next prime is 643561010151569. The reversal of 643561010151543 is 345151010165346.

643561010151543 is a `hidden beast` number, since 6 + 4 + 3 + 5 + 610 + 1 + 0 + 15 + 15 + 4 + 3 = 666.

It is not a de Polignac number, because 643561010151543 - 2¹⁰ = 643561010150519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643561010151533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 225583233 + ... + 228418293.

It is an arithmetic number, because the mean of its divisors is an integer number (21229091679224).

Almost surely, 2^{643561010151543} is an apocalyptic number.

643561010151543 is a deficient number, since it is larger than the sum of its proper divisors (375435390451209).

643561010151543 is a wasteful number, since it uses less digits than its factorization.

643561010151543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2846156 (or 2846153 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 45.

The spelling of 643561010151543 in words is "six hundred forty-three trillion, five hundred sixty-one billion, ten million, one hundred fifty-one thousand, five hundred forty-three".