640253846483 has 2 divisors, whose sum is σ = 640253846484. Its totient is φ = 640253846482.

The previous prime is 640253846423. The next prime is 640253846539. The reversal of 640253846483 is 384648352046.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 640253846483 - 2³² = 635958879187 is a prime.

It is not a weakly prime, because it can be changed into another prime (640253846423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320126923241 + 320126923242.

It is an arithmetic number, because the mean of its divisors is an integer number (320126923242).

Almost surely, 2^640253846483 is an apocalyptic number.

640253846483 is a deficient number, since it is larger than the sum of its proper divisors (1).

640253846483 is an equidigital number, since it uses as much as digits as its factorization.

640253846483 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13271040, while the sum is 53.

The spelling of 640253846483 in words is "six hundred forty billion, two hundred fifty-three million, eight hundred forty-six thousand, four hundred eighty-three".