640481105027 has 2 divisors, whose sum is σ = 640481105028. Its totient is φ = 640481105026.

The previous prime is 640481105009. The next prime is 640481105039. The reversal of 640481105027 is 720501184046.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 640481105027 - 2³² = 636186137731 is a prime.

It is not a weakly prime, because it can be changed into another prime (640481185027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320240552513 + 320240552514.

It is an arithmetic number, because the mean of its divisors is an integer number (320240552514).

Almost surely, 2^640481105027 is an apocalyptic number.

640481105027 is a deficient number, since it is larger than the sum of its proper divisors (1).

640481105027 is an equidigital number, since it uses as much as digits as its factorization.

640481105027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 53760, while the sum is 38.

The spelling of 640481105027 in words is "six hundred forty billion, four hundred eighty-one million, one hundred five thousand, twenty-seven".