640256063016 has 16 divisors (see below), whose sum is σ = 1600640157600. Its totient is φ = 213418687664.

The previous prime is 640256062987. The next prime is 640256063087. The reversal of 640256063016 is 610360652046.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13338667956 + ... + 13338668003.

It is an arithmetic number, because the mean of its divisors is an integer number (100040009850).

Almost surely, 2^640256063016 is an apocalyptic number.

It is an amenable number.

640256063016 is an abundant number, since it is smaller than the sum of its proper divisors (960384094584).

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

640256063016 is a wasteful number, since it uses less digits than its factorization.

640256063016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26677335968 (or 26677335964 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 39.

The spelling of 640256063016 in words is "six hundred forty billion, two hundred fifty-six million, sixty-three thousand, sixteen".