655554768 has 160 divisors (see below), whose sum is σ = 1928638464. Its totient is φ = 191664000.

The previous prime is 655554751. The next prime is 655554769. The reversal of 655554768 is 867455556.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 655554768.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655554769) 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, 1980363 + ... + 1980693.

Almost surely, 2^655554768 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 655554768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (964319232).

655554768 is an abundant number, since it is smaller than the sum of its proper divisors (1273083696).

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

655554768 is a wasteful number, since it uses less digits than its factorization.

655554768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406 (or 378 counting only the distinct ones).

The product of its digits is 5040000, while the sum is 51.

The square root of 655554768 is about 25603.8037799074. The cubic root of 655554768 is about 868.6996772397.

The spelling of 655554768 in words is "six hundred fifty-five million, five hundred fifty-four thousand, seven hundred sixty-eight".