655561100 has 18 divisors (see below), whose sum is σ = 1422567804. Its totient is φ = 262224400.

The previous prime is 655561099. The next prime is 655561147. The reversal of 655561100 is 1165556.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3277706 + ... + 3277905.

Almost surely, 2^655561100 is an apocalyptic number.

It is an amenable number.

655561100 is an abundant number, since it is smaller than the sum of its proper divisors (767006704).

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

655561100 is a wasteful number, since it uses less digits than its factorization.

655561100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6555625 (or 6555618 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 655561100 is about 25603.9274331107. The cubic root of 655561100 is about 868.7024741525.

The spelling of 655561100 in words is "six hundred fifty-five million, five hundred sixty-one thousand, one hundred".