647577346620 has 24 divisors (see below), whose sum is σ = 1813216570704. Its totient is φ = 172687292416.

The previous prime is 647577346601. The next prime is 647577346631. The reversal of 647577346620 is 26643775746.

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 7 ways as a sum of consecutive naturals, for example, 5396477829 + ... + 5396477948.

It is an arithmetic number, because the mean of its divisors is an integer number (75550690446).

Almost surely, 2^647577346620 is an apocalyptic number.

647577346620 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

647577346620 is an abundant number, since it is smaller than the sum of its proper divisors (1165639224084).

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

647577346620 is a wasteful number, since it uses less digits than its factorization.

647577346620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10792955789 (or 10792955787 counting only the distinct ones).

The product of its (nonzero) digits is 35562240, while the sum is 57.

The spelling of 647577346620 in words is "six hundred forty-seven billion, five hundred seventy-seven million, three hundred forty-six thousand, six hundred twenty".