655838042240 has 64 divisors (see below), whose sum is σ = 1581737886360. Its totient is φ = 260013637632.

The previous prime is 655838042147. The next prime is 655838042267. The reversal of 655838042240 is 42240838556.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 166744822336 + 489093219904 = 408344^2 + 699352^2 .

It is a tau number, because it is divible by the number of its divisors (64).

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, 4461959 + ... + 4606598.

Almost surely, 2^655838042240 is an apocalyptic number.

It is an amenable number.

655838042240 is an abundant number, since it is smaller than the sum of its proper divisors (925899844120).

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

655838042240 is a wasteful number, since it uses less digits than its factorization.

655838042240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9068689 (or 9068677 counting only the distinct ones).

The product of its (nonzero) digits is 1843200, while the sum is 47.

The spelling of 655838042240 in words is "six hundred fifty-five billion, eight hundred thirty-eight million, forty-two thousand, two hundred forty".