643624026654043 has 2 divisors, whose sum is σ = 643624026654044. Its totient is φ = 643624026654042.

The previous prime is 643624026653999. The next prime is 643624026654181. The reversal of 643624026654043 is 340456620426346.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 643624026654043 - 2²⁵ = 643623993099611 is a prime.

It is not a weakly prime, because it can be changed into another prime (643624026654743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321812013327021 + 321812013327022.

It is an arithmetic number, because the mean of its divisors is an integer number (321812013327022).

Almost surely, 2^{643624026654043} is an apocalyptic number.

643624026654043 is a deficient number, since it is larger than the sum of its proper divisors (1).

643624026654043 is an equidigital number, since it uses as much as digits as its factorization.

643624026654043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 59719680, while the sum is 55.

The spelling of 643624026654043 in words is "six hundred forty-three trillion, six hundred twenty-four billion, twenty-six million, six hundred fifty-four thousand, forty-three".