655105857 has 16 divisors (see below), whose sum is σ = 1030459392. Its totient is φ = 362270160.

The previous prime is 655105823. The next prime is 655105859. The reversal of 655105857 is 758501556.

It is not a de Polignac number, because 655105857 - 2⁶ = 655105793 is a prime.

It is a super-3 number, since 3×655105857³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (655105859) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 502503 + ... + 503804.

It is an arithmetic number, because the mean of its divisors is an integer number (64403712).

Almost surely, 2^655105857 is an apocalyptic number.

It is an amenable number.

655105857 is a deficient number, since it is larger than the sum of its proper divisors (375353535).

655105857 is a wasteful number, since it uses less digits than its factorization.

655105857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1006348.

The product of its (nonzero) digits is 210000, while the sum is 42.

The square root of 655105857 is about 25595.0357882149. The cubic root of 655105857 is about 868.5013424816.

The spelling of 655105857 in words is "six hundred fifty-five million, one hundred five thousand, eight hundred fifty-seven".