655205650 has 24 divisors (see below), whose sum is σ = 1329472944. Its totient is φ = 238256400.

The previous prime is 655205591. The next prime is 655205711. The reversal of 655205650 is 56502556.

It is a happy number.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

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 11 ways as a sum of consecutive naturals, for example, 595092 + ... + 596191.

It is an arithmetic number, because the mean of its divisors is an integer number (55394706).

Almost surely, 2^655205650 is an apocalyptic number.

655205650 is an abundant number, since it is smaller than the sum of its proper divisors (674267294).

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

655205650 is a wasteful number, since it uses less digits than its factorization.

655205650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1191306 (or 1191301 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 34.

The square root of 655205650 is about 25596.9851740395. The cubic root of 655205650 is about 868.5454401660.

The spelling of 655205650 in words is "six hundred fifty-five million, two hundred five thousand, six hundred fifty".