655810563 has 4 divisors (see below), whose sum is σ = 874414088. Its totient is φ = 437207040.

The previous prime is 655810559. The next prime is 655810567. The reversal of 655810563 is 365018556.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (655810559) and next prime (655810567).

It is not a de Polignac number, because 655810563 - 2² = 655810559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (655810567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109301758 + ... + 109301763.

It is an arithmetic number, because the mean of its divisors is an integer number (218603522).

Almost surely, 2^655810563 is an apocalyptic number.

655810563 is a deficient number, since it is larger than the sum of its proper divisors (218603525).

655810563 is a wasteful number, since it uses less digits than its factorization.

655810563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218603524.

The product of its (nonzero) digits is 108000, while the sum is 39.

The square root of 655810563 is about 25608.7985465933. The cubic root of 655810563 is about 868.8126503272.

The spelling of 655810563 in words is "six hundred fifty-five million, eight hundred ten thousand, five hundred sixty-three".