640450458311 has 2 divisors, whose sum is σ = 640450458312. Its totient is φ = 640450458310.

The previous prime is 640450458299. The next prime is 640450458337. The reversal of 640450458311 is 113854054046.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 640450458311 - 2⁶ = 640450458247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (640450458391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320225229155 + 320225229156.

It is an arithmetic number, because the mean of its divisors is an integer number (320225229156).

Almost surely, 2^640450458311 is an apocalyptic number.

640450458311 is a deficient number, since it is larger than the sum of its proper divisors (1).

640450458311 is an equidigital number, since it uses as much as digits as its factorization.

640450458311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 230400, while the sum is 41.

The spelling of 640450458311 in words is "six hundred forty billion, four hundred fifty million, four hundred fifty-eight thousand, three hundred eleven".