655128616 has 32 divisors (see below), whose sum is σ = 1245816000. Its totient is φ = 322940160.

The previous prime is 655128599. The next prime is 655128631. The reversal of 655128616 is 616821556.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 196935 + ... + 200233.

It is an arithmetic number, because the mean of its divisors is an integer number (38931750).

Almost surely, 2^655128616 is an apocalyptic number.

It is an amenable number.

655128616 is a deficient number, since it is larger than the sum of its proper divisors (590687384).

655128616 is a wasteful number, since it uses less digits than its factorization.

655128616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3649 (or 3645 counting only the distinct ones).

The product of its digits is 86400, while the sum is 40.

The square root of 655128616 is about 25595.4803822862. The cubic root of 655128616 is about 868.5113998857.

The spelling of 655128616 in words is "six hundred fifty-five million, one hundred twenty-eight thousand, six hundred sixteen".