655051820 has 24 divisors (see below), whose sum is σ = 1456527744. Its totient is φ = 246607616.

The previous prime is 655051819. The next prime is 655051841. The reversal of 655051820 is 28150556.

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 7 ways as a sum of consecutive naturals, for example, 962972 + ... + 963651.

It is an arithmetic number, because the mean of its divisors is an integer number (60688656).

Almost surely, 2^655051820 is an apocalyptic number.

It is an amenable number.

655051820 is an abundant number, since it is smaller than the sum of its proper divisors (801475924).

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

655051820 is a wasteful number, since it uses less digits than its factorization.

655051820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1926649 (or 1926647 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 32.

The square root of 655051820 is about 25593.9801515903. The cubic root of 655051820 is about 868.4774621183.

The spelling of 655051820 in words is "six hundred fifty-five million, fifty-one thousand, eight hundred twenty".