655811424 has 96 divisors (see below), whose sum is σ = 1922991840. Its totient is φ = 217437696.

The previous prime is 655811419. The next prime is 655811449. The reversal of 655811424 is 424118556.

It is a happy number.

655811424 is a `hidden beast` number, since 65 + 581 + 14 + 2 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 168282 + ... + 172134.

It is an arithmetic number, because the mean of its divisors is an integer number (20031165).

Almost surely, 2^655811424 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 655811424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (961495920).

655811424 is an abundant number, since it is smaller than the sum of its proper divisors (1267180416).

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

655811424 is a wasteful number, since it uses less digits than its factorization.

655811424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4069 (or 4055 counting only the distinct ones).

The product of its digits is 38400, while the sum is 36.

The square root of 655811424 is about 25608.8153572164. The cubic root of 655811424 is about 868.8130305423.

The spelling of 655811424 in words is "six hundred fifty-five million, eight hundred eleven thousand, four hundred twenty-four".