640829201292 has 72 divisors (see below), whose sum is σ = 1868586160896. Its totient is φ = 181382890464.

The previous prime is 640829201269. The next prime is 640829201303. The reversal of 640829201292 is 292102928046.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 11856088 + ... + 11910015.

It is an arithmetic number, because the mean of its divisors is an integer number (25952585568).

Almost surely, 2^640829201292 is an apocalyptic number.

It is an amenable number.

640829201292 is an abundant number, since it is smaller than the sum of its proper divisors (1227756959604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

640829201292 is a wasteful number, since it uses less digits than its factorization.

640829201292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23766227 (or 23766222 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The spelling of 640829201292 in words is "six hundred forty billion, eight hundred twenty-nine million, two hundred one thousand, two hundred ninety-two".