640798160106 has 64 divisors (see below), whose sum is σ = 1461716928000. Its totient is φ = 185526168576.

The previous prime is 640798160083. The next prime is 640798160137. The reversal of 640798160106 is 601061897046.

It is a happy number.

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, 5711215 + ... + 5822333.

It is an arithmetic number, because the mean of its divisors is an integer number (22839327000).

Almost surely, 2^640798160106 is an apocalyptic number.

640798160106 is an abundant number, since it is smaller than the sum of its proper divisors (820918767894).

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

640798160106 is a wasteful number, since it uses less digits than its factorization.

640798160106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115503.

The product of its (nonzero) digits is 435456, while the sum is 48.

The spelling of 640798160106 in words is "six hundred forty billion, seven hundred ninety-eight million, one hundred sixty thousand, one hundred six".