643606614144002 has 16 divisors (see below), whose sum is σ = 1025998735442040. Its totient is φ = 301747776231168.

The previous prime is 643606614143993. The next prime is 643606614144029. The reversal of 643606614144002 is 200441416606346.

It can be written as a sum of positive squares in 4 ways, for example, as 587347778797081 + 56258835346921 = 24235259^2 + 7500589^2 .

It is an unprimeable number.

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, 35185132673 + ... + 35185150964.

Almost surely, 2^{643606614144002} is an apocalyptic number.

643606614144002 is a deficient number, since it is larger than the sum of its proper divisors (382392121298038).

643606614144002 is a wasteful number, since it uses less digits than its factorization.

643606614144002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70370283925.

The product of its (nonzero) digits is 1990656, while the sum is 47.

The spelling of 643606614144002 in words is "six hundred forty-three trillion, six hundred six billion, six hundred fourteen million, one hundred forty-four thousand, two".