644241058411 has 2 divisors, whose sum is σ = 644241058412. Its totient is φ = 644241058410.

The previous prime is 644241058403. The next prime is 644241058493. The reversal of 644241058411 is 114850142446.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 644241058411 - 2³ = 644241058403 is a prime.

It is not a weakly prime, because it can be changed into another prime (644241058711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 322120529205 + 322120529206.

It is an arithmetic number, because the mean of its divisors is an integer number (322120529206).

Almost surely, 2^644241058411 is an apocalyptic number.

644241058411 is a deficient number, since it is larger than the sum of its proper divisors (1).

644241058411 is an equidigital number, since it uses as much as digits as its factorization.

644241058411 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 122880, while the sum is 40.

The spelling of 644241058411 in words is "six hundred forty-four billion, two hundred forty-one million, fifty-eight thousand, four hundred eleven".