643016012061 has 8 divisors (see below), whose sum is σ = 857370749344. Its totient is φ = 428669308080.

The previous prime is 643016012017. The next prime is 643016012063. The reversal of 643016012061 is 160210610346.

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

It is not a de Polignac number, because 643016012061 - 2⁶ = 643016011997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643016012063) 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 7 ways as a sum of consecutive naturals, for example, 1819006 + ... + 2143551.

It is an arithmetic number, because the mean of its divisors is an integer number (107171343668).

Almost surely, 2^643016012061 is an apocalyptic number.

It is an amenable number.

643016012061 is a deficient number, since it is larger than the sum of its proper divisors (214354737283).

643016012061 is a wasteful number, since it uses less digits than its factorization.

643016012061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4016651.

The product of its (nonzero) digits is 5184, while the sum is 30.

The spelling of 643016012061 in words is "six hundred forty-three billion, sixteen million, twelve thousand, sixty-one".