1565116255 has 4 divisors (see below), whose sum is σ = 1878139512. Its totient is φ = 1252093000.

The previous prime is 1565116249. The next prime is 1565116297. The reversal of 1565116255 is 5526115651.

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

It is not a de Polignac number, because 1565116255 - 2¹¹ = 1565114207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156511621 + ... + 156511630.

It is an arithmetic number, because the mean of its divisors is an integer number (469534878).

Almost surely, 2^1565116255 is an apocalyptic number.

1565116255 is a deficient number, since it is larger than the sum of its proper divisors (313023257).

1565116255 is an equidigital number, since it uses as much as digits as its factorization.

1565116255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313023256.

The product of its digits is 45000, while the sum is 37.

The square root of 1565116255 is about 39561.5502097681. The cubic root of 1565116255 is about 1161.0445048588.

The spelling of 1565116255 in words is "one billion, five hundred sixty-five million, one hundred sixteen thousand, two hundred fifty-five".