640508577846 has 64 divisors (see below), whose sum is σ = 1326958364160. Its totient is φ = 205978832640.

The previous prime is 640508577833. The next prime is 640508577853. The reversal of 640508577846 is 648775805046.

It is a self number, because there is not a number n which added to its sum of digits gives 640508577846.

It is a congruent 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, 10306306 + ... + 10368266.

It is an arithmetic number, because the mean of its divisors is an integer number (20733724440).

Almost surely, 2^640508577846 is an apocalyptic number.

640508577846 is an abundant number, since it is smaller than the sum of its proper divisors (686449786314).

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

640508577846 is a wasteful number, since it uses less digits than its factorization.

640508577846 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62501.

The product of its (nonzero) digits is 45158400, while the sum is 60.

The spelling of 640508577846 in words is "six hundred forty billion, five hundred eight million, five hundred seventy-seven thousand, eight hundred forty-six".