643716020958 has 8 divisors (see below), whose sum is σ = 1287432041928. Its totient is φ = 214572006984.

The previous prime is 643716020933. The next prime is 643716020971. The reversal of 643716020958 is 859020617346.

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

643716020958 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 643716020958.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53643001741 + ... + 53643001752.

It is an arithmetic number, because the mean of its divisors is an integer number (160929005241).

It is a 1-persistent number, because it is pandigital, but 2⋅643716020958 = 1287432041916 is not.

Almost surely, 2^643716020958 is an apocalyptic number.

643716020958 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

643716020958 is a wasteful number, since it uses less digits than its factorization.

643716020958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107286003498.

The product of its (nonzero) digits is 2177280, while the sum is 51.

The spelling of 643716020958 in words is "six hundred forty-three billion, seven hundred sixteen million, twenty thousand, nine hundred fifty-eight".