640361242160616 has 128 divisors (see below), whose sum is σ = 1649176145971200. Its totient is φ = 207084592915200.

The previous prime is 640361242160557. The next prime is 640361242160687. The reversal of 640361242160616 is 616061242163046.

It is a super-2 number, since 2×640361242160616² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1347241690 + ... + 1347716918.

It is an arithmetic number, because the mean of its divisors is an integer number (12884188640400).

Almost surely, 2^{640361242160616} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 640361242160616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (824588072985600).

640361242160616 is an abundant number, since it is smaller than the sum of its proper divisors (1008814903810584).

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

640361242160616 is a wasteful number, since it uses less digits than its factorization.

640361242160616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484079 (or 484075 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 48.

The spelling of 640361242160616 in words is "six hundred forty trillion, three hundred sixty-one billion, two hundred forty-two million, one hundred sixty thousand, six hundred sixteen".