655316785 has 8 divisors (see below), whose sum is σ = 794166696. Its totient is φ = 519062400.

The previous prime is 655316777. The next prime is 655316803. The reversal of 655316785 is 587613556.

It can be written as a sum of positive squares in 4 ways, for example, as 394300449 + 261016336 = 19857^2 + 16156^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 655316785 - 2³ = 655316777 is a prime.

It is a Duffinian number.

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, 648324 + ... + 649333.

It is an arithmetic number, because the mean of its divisors is an integer number (99270837).

Almost surely, 2^655316785 is an apocalyptic number.

It is an amenable number.

655316785 is a deficient number, since it is larger than the sum of its proper divisors (138849911).

655316785 is a wasteful number, since it uses less digits than its factorization.

655316785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1297763.

The product of its digits is 756000, while the sum is 46.

The square root of 655316785 is about 25599.1559431166. The cubic root of 655316785 is about 868.5945445148.

The spelling of 655316785 in words is "six hundred fifty-five million, three hundred sixteen thousand, seven hundred eighty-five".