648820555884 has 72 divisors (see below), whose sum is σ = 1737162908208. Its totient is φ = 203479603200.

The previous prime is 648820555861. The next prime is 648820555939. The reversal of 648820555884 is 488555028846.

648820555884 is a `hidden beast` number, since 6 + 48 + 8 + 2 + 0 + 5 + 5 + 588 + 4 = 666.

It is a super-2 number, since 2×648820555884² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1558884 + ... + 1930740.

It is an arithmetic number, because the mean of its divisors is an integer number (24127262614).

Almost surely, 2^648820555884 is an apocalyptic number.

It is an amenable number.

648820555884 is an abundant number, since it is smaller than the sum of its proper divisors (1088342352324).

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

648820555884 is a wasteful number, since it uses less digits than its factorization.

648820555884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374735 (or 374730 counting only the distinct ones).

The product of its (nonzero) digits is 98304000, while the sum is 63.

The spelling of 648820555884 in words is "six hundred forty-eight billion, eight hundred twenty million, five hundred fifty-five thousand, eight hundred eighty-four".