640255014379 has 2 divisors, whose sum is σ = 640255014380. Its totient is φ = 640255014378.

The previous prime is 640255014359. The next prime is 640255014433. The reversal of 640255014379 is 973410552046.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 640255014379 - 2²³ = 640246625771 is a prime.

It is not a weakly prime, because it can be changed into another prime (640255014359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320127507189 + 320127507190.

It is an arithmetic number, because the mean of its divisors is an integer number (320127507190).

Almost surely, 2^640255014379 is an apocalyptic number.

640255014379 is a deficient number, since it is larger than the sum of its proper divisors (1).

640255014379 is an equidigital number, since it uses as much as digits as its factorization.

640255014379 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 907200, while the sum is 46.

The spelling of 640255014379 in words is "six hundred forty billion, two hundred fifty-five million, fourteen thousand, three hundred seventy-nine".