648719240731056 has 60 divisors (see below), whose sum is σ = 1980559500115560. Its totient is φ = 196581588099840.

The previous prime is 648719240731031. The next prime is 648719240731073. The reversal of 648719240731056 is 650137042917846.

648719240731056 is a `hidden beast` number, since 6 + 4 + 8 + 7 + 192 + 407 + 31 + 0 + 5 + 6 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 648719240730984 and 648719240731002.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 204772486021 + ... + 204772489188.

It is an arithmetic number, because the mean of its divisors is an integer number (33009325001926).

It is a 1-persistent number, because it is pandigital, but 2⋅648719240731056 = 1297438481462112 is not.

Almost surely, 2^{648719240731056} is an apocalyptic number.

648719240731056 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

648719240731056 is an abundant number, since it is smaller than the sum of its proper divisors (1331840259384504).

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

648719240731056 is a wasteful number, since it uses less digits than its factorization.

648719240731056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409544975234 (or 409544975225 counting only the distinct ones).

The product of its (nonzero) digits is 60963840, while the sum is 63.

The spelling of 648719240731056 in words is "six hundred forty-eight trillion, seven hundred nineteen billion, two hundred forty million, seven hundred thirty-one thousand, fifty-six".