655261290 has 48 divisors (see below), whose sum is σ = 1715968800. Its totient is φ = 173475936.

The previous prime is 655261289. The next prime is 655261297. The reversal of 655261290 is 92162556.

655261290 is a `hidden beast` number, since 6 + 5 + 526 + 129 + 0 = 666.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (655261297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13680 + ... + 38699.

It is an arithmetic number, because the mean of its divisors is an integer number (35749350).

Almost surely, 2^655261290 is an apocalyptic number.

655261290 is an abundant number, since it is smaller than the sum of its proper divisors (1060707510).

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

655261290 is a wasteful number, since it uses less digits than its factorization.

655261290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52531 (or 52528 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 655261290 is about 25598.0719977111. The cubic root of 655261290 is about 868.5700250681.

The spelling of 655261290 in words is "six hundred fifty-five million, two hundred sixty-one thousand, two hundred ninety".