654021648 has 160 divisors (see below), whose sum is σ = 2258585600. Its totient is φ = 177012864.

The previous prime is 654021631. The next prime is 654021649. The reversal of 654021648 is 846120456.

654021648 is a `hidden beast` number, since 6 + 5 + 4 + 0 + 2 + 1 + 648 = 666.

It is a super-3 number, since 3×654021648³ (a number of 27 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (654021649) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51765 + ... + 63147.

It is an arithmetic number, because the mean of its divisors is an integer number (14116160).

Almost surely, 2^654021648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 654021648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1129292800).

654021648 is an abundant number, since it is smaller than the sum of its proper divisors (1604563952).

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

654021648 is a wasteful number, since it uses less digits than its factorization.

654021648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11426 (or 11414 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 654021648 is about 25573.8469534796. The cubic root of 654021648 is about 868.0219507853.

The spelling of 654021648 in words is "six hundred fifty-four million, twenty-one thousand, six hundred forty-eight".