643350776411131 has 8 divisors (see below), whose sum is σ = 659045287830384. Its totient is φ = 627656409233280.

The previous prime is 643350776411017. The next prime is 643350776411149. The reversal of 643350776411131 is 131114677053346.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 643350776411131 - 2⁹ = 643350776410619 is a prime.

It is a super-2 number, since 2×643350776411131² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (643350776411191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27003661 + ... + 44898766.

It is an arithmetic number, because the mean of its divisors is an integer number (82380660978798).

Almost surely, 2^{643350776411131} is an apocalyptic number.

643350776411131 is a deficient number, since it is larger than the sum of its proper divisors (15694511419253).

643350776411131 is a wasteful number, since it uses less digits than its factorization.

643350776411131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72120701.

The product of its (nonzero) digits is 3810240, while the sum is 52.

The spelling of 643350776411131 in words is "six hundred forty-three trillion, three hundred fifty billion, seven hundred seventy-six million, four hundred eleven thousand, one hundred thirty-one".