640829201283 has 48 divisors (see below), whose sum is σ = 953656045056. Its totient is φ = 414435147840.

The previous prime is 640829201269. The next prime is 640829201303. The reversal of 640829201283 is 382102928046.

It is not a de Polignac number, because 640829201283 - 2⁵ = 640829201251 is a prime.

It is not an unprimeable number, because it can be changed into a prime (640829201213) 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 in 47 ways as a sum of consecutive naturals, for example, 36975766 + ... + 36993092.

It is an arithmetic number, because the mean of its divisors is an integer number (19867834272).

Almost surely, 2^640829201283 is an apocalyptic number.

640829201283 is a deficient number, since it is larger than the sum of its proper divisors (312826843773).

640829201283 is a wasteful number, since it uses less digits than its factorization.

640829201283 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18024 (or 18021 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The spelling of 640829201283 in words is "six hundred forty billion, eight hundred twenty-nine million, two hundred one thousand, two hundred eighty-three".