640209617096 has 16 divisors (see below), whose sum is σ = 1371877751040. Its totient is φ = 274375550160.

The previous prime is 640209617053. The next prime is 640209617101. The reversal of 640209617096 is 690716902046.

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, 5716157240 + ... + 5716157351.

It is an arithmetic number, because the mean of its divisors is an integer number (85742359440).

Almost surely, 2^640209617096 is an apocalyptic number.

It is an amenable number.

640209617096 is an abundant number, since it is smaller than the sum of its proper divisors (731668133944).

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

640209617096 is a wasteful number, since it uses less digits than its factorization.

640209617096 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11432314604 (or 11432314600 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 50.

The spelling of 640209617096 in words is "six hundred forty billion, two hundred nine million, six hundred seventeen thousand, ninety-six".