640547301020 has 48 divisors (see below), whose sum is σ = 1468697989248. Its totient is φ = 232725917760.

The previous prime is 640547301001. The next prime is 640547301061. The reversal of 640547301020 is 20103745046.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 995894 + ... + 1507613.

It is an arithmetic number, because the mean of its divisors is an integer number (30597874776).

Almost surely, 2^640547301020 is an apocalyptic number.

It is an amenable number.

640547301020 is an abundant number, since it is smaller than the sum of its proper divisors (828150688228).

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

640547301020 is a wasteful number, since it uses less digits than its factorization.

640547301020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2504690 (or 2504688 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 32.

The spelling of 640547301020 in words is "six hundred forty billion, five hundred forty-seven million, three hundred one thousand, twenty".