655275140 has 48 divisors (see below), whose sum is σ = 1487369520. Its totient is φ = 241059840.

The previous prime is 655275121. The next prime is 655275157. The reversal of 655275140 is 41572556.

It can be written as a sum of positive squares in 8 ways, for example, as 17106496 + 638168644 = 4136^2 + 25262^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 655275140.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68576 + ... + 77544.

It is an arithmetic number, because the mean of its divisors is an integer number (30986865).

Almost surely, 2^655275140 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 655275140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (743684760).

655275140 is an abundant number, since it is smaller than the sum of its proper divisors (832094380).

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

655275140 is a wasteful number, since it uses less digits than its factorization.

655275140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9272 (or 9270 counting only the distinct ones).

The product of its (nonzero) digits is 42000, while the sum is 35.

The square root of 655275140 is about 25598.3425244683. The cubic root of 655275140 is about 868.5761445659.

The spelling of 655275140 in words is "six hundred fifty-five million, two hundred seventy-five thousand, one hundred forty".