654617644 has 12 divisors (see below), whose sum is σ = 1173522168. Its totient is φ = 319325600.

The previous prime is 654617629. The next prime is 654617713. The reversal of 654617644 is 446716456.

It is a super-2 number, since 2×654617644² = 857048519672221472, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 654617644.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1995622 + ... + 1995949.

It is an arithmetic number, because the mean of its divisors is an integer number (97793514).

Almost surely, 2^654617644 is an apocalyptic number.

It is an amenable number.

654617644 is a deficient number, since it is larger than the sum of its proper divisors (518904524).

654617644 is a wasteful number, since it uses less digits than its factorization.

654617644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3991616 (or 3991614 counting only the distinct ones).

The product of its digits is 483840, while the sum is 43.

The square root of 654617644 is about 25585.4967510893. The cubic root of 654617644 is about 868.2855407064.

The spelling of 654617644 in words is "six hundred fifty-four million, six hundred seventeen thousand, six hundred forty-four".