643103454360021 has 8 divisors (see below), whose sum is σ = 885131636108544. Its totient is φ = 414905454425760.

The previous prime is 643103454360019. The next prime is 643103454360043. The reversal of 643103454360021 is 120063454301346.

643103454360021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 643103454360021 - 2¹ = 643103454360019 is a prime.

It is a super-2 number, since 2×643103454360021² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643103454360011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3457545453456 + ... + 3457545453641.

It is an arithmetic number, because the mean of its divisors is an integer number (110641454513568).

Almost surely, 2^{643103454360021} is an apocalyptic number.

It is an amenable number.

643103454360021 is a deficient number, since it is larger than the sum of its proper divisors (242028181748523).

643103454360021 is a wasteful number, since it uses less digits than its factorization.

643103454360021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6915090907131.

The product of its (nonzero) digits is 622080, while the sum is 42.

The spelling of 643103454360021 in words is "six hundred forty-three trillion, one hundred three billion, four hundred fifty-four million, three hundred sixty thousand, twenty-one".