640435166616 has 64 divisors (see below), whose sum is σ = 1835057952000. Its totient is φ = 182457157248.

The previous prime is 640435166599. The next prime is 640435166641. The reversal of 640435166616 is 616661534046.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 5402850 + ... + 5520113.

It is an arithmetic number, because the mean of its divisors is an integer number (28672780500).

Almost surely, 2^640435166616 is an apocalyptic number.

It is an amenable number.

640435166616 is an abundant number, since it is smaller than the sum of its proper divisors (1194622785384).

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

640435166616 is a wasteful number, since it uses less digits than its factorization.

640435166616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10923328 (or 10923324 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 48.

The spelling of 640435166616 in words is "six hundred forty billion, four hundred thirty-five million, one hundred sixty-six thousand, six hundred sixteen".