655115565 has 16 divisors (see below), whose sum is σ = 1128814848. Its totient is φ = 322518336.

The previous prime is 655115557. The next prime is 655115603. The reversal of 655115565 is 565511556.

It is not a de Polignac number, because 655115565 - 2³ = 655115557 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

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, 1679589 + ... + 1679978.

It is an arithmetic number, because the mean of its divisors is an integer number (70550928).

Almost surely, 2^655115565 is an apocalyptic number.

655115565 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

655115565 is a deficient number, since it is larger than the sum of its proper divisors (473699283).

655115565 is a wasteful number, since it uses less digits than its factorization.

655115565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3359588.

The product of its digits is 112500, while the sum is 39.

The square root of 655115565 is about 25595.2254336624. The cubic root of 655115565 is about 868.5056325614.

The spelling of 655115565 in words is "six hundred fifty-five million, one hundred fifteen thousand, five hundred sixty-five".