641284203507979 has 2 divisors, whose sum is σ = 641284203507980. Its totient is φ = 641284203507978.

The previous prime is 641284203507977. The next prime is 641284203508021. The reversal of 641284203507979 is 979705302482146.

641284203507979 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 641284203507979 - 2¹ = 641284203507977 is a prime.

It is a super-2 number, since 2×641284203507979² (a number of 30 digits) contains 22 as substring.

Together with 641284203507977, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (641284203507971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320642101753989 + 320642101753990.

It is an arithmetic number, because the mean of its divisors is an integer number (320642101753990).

It is a 1-persistent number, because it is pandigital, but 2⋅641284203507979 = 1282568407015958 is not.

Almost surely, 2^{641284203507979} is an apocalyptic number.

641284203507979 is a deficient number, since it is larger than the sum of its proper divisors (1).

641284203507979 is an equidigital number, since it uses as much as digits as its factorization.

641284203507979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 182891520, while the sum is 67.

The spelling of 641284203507979 in words is "six hundred forty-one trillion, two hundred eighty-four billion, two hundred three million, five hundred seven thousand, nine hundred seventy-nine".