643136068012424 has 64 divisors (see below), whose sum is σ = 1450975525468800. Its totient is φ = 261070235080704.

The previous prime is 643136068012423. The next prime is 643136068012453. The reversal of 643136068012424 is 424210860631346.

It is not an unprimeable number, because it can be changed into a prime (643136068012421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55695209 + ... + 66243704.

It is an arithmetic number, because the mean of its divisors is an integer number (22671492585450).

Almost surely, 2^{643136068012424} is an apocalyptic number.

It is an amenable number.

643136068012424 is an abundant number, since it is smaller than the sum of its proper divisors (807839457456376).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

643136068012424 is a wasteful number, since it uses less digits than its factorization.

643136068012424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121943902 (or 121943898 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 50.

The spelling of 643136068012424 in words is "six hundred forty-three trillion, one hundred thirty-six billion, sixty-eight million, twelve thousand, four hundred twenty-four".