654647646 has 32 divisors (see below), whose sum is σ = 1363534848. Its totient is φ = 209301120.

The previous prime is 654647633. The next prime is 654647647. The reversal of 654647646 is 646746456.

It is a junction number, because it is equal to n+sod(n) for n = 654647595 and 654647604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (654647647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5445 + ... + 36591.

It is an arithmetic number, because the mean of its divisors is an integer number (42610464).

Almost surely, 2^654647646 is an apocalyptic number.

654647646 is an abundant number, since it is smaller than the sum of its proper divisors (708887202).

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

654647646 is a wasteful number, since it uses less digits than its factorization.

654647646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31296.

The product of its digits is 2903040, while the sum is 48.

The square root of 654647646 is about 25586.0830530974. The cubic root of 654647646 is about 868.2988053987.

The spelling of 654647646 in words is "six hundred fifty-four million, six hundred forty-seven thousand, six hundred forty-six".