2565554975 has 18 divisors (see below), whose sum is σ = 3202312896. Its totient is φ = 2038912800.

The previous prime is 2565554969. The next prime is 2565555007. The reversal of 2565554975 is 5794555652.

It is a de Polignac number, because none of the positive numbers 2^k-2565554975 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 (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3499709 + ... + 3500441.

It is an arithmetic number, because the mean of its divisors is an integer number (177906272).

Almost surely, 2^2565554975 is an apocalyptic number.

2565554975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2565554975 is a deficient number, since it is larger than the sum of its proper divisors (636757921).

2565554975 is an frugal number, since it uses more digits than its factorization.

2565554975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1667 (or 929 counting only the distinct ones).

The product of its digits is 9450000, while the sum is 53.

The square root of 2565554975 is about 50651.3077323775. The cubic root of 2565554975 is about 1368.9695085217.

The spelling of 2565554975 in words is "two billion, five hundred sixty-five million, five hundred fifty-four thousand, nine hundred seventy-five".