655558385 has 8 divisors (see below), whose sum is σ = 787236840. Its totient is φ = 524068864.

The previous prime is 655558361. The next prime is 655558411. The reversal of 655558385 is 583855556.

It can be written as a sum of positive squares in 4 ways, for example, as 36096064 + 619462321 = 6008^2 + 24889^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 655558385 - 2⁸ = 655558129 is a prime.

It is a super-2 number, since 2×655558385² = 859513592287616450, which contains 22 as substring.

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, 39482 + ... + 53571.

It is an arithmetic number, because the mean of its divisors is an integer number (98404605).

Almost surely, 2^655558385 is an apocalyptic number.

It is an amenable number.

655558385 is a deficient number, since it is larger than the sum of its proper divisors (131678455).

655558385 is a wasteful number, since it uses less digits than its factorization.

655558385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94467.

The product of its digits is 3600000, while the sum is 50.

The square root of 655558385 is about 25603.8744138460. The cubic root of 655558385 is about 868.7012749099.

The spelling of 655558385 in words is "six hundred fifty-five million, five hundred fifty-eight thousand, three hundred eighty-five".