2565503057 has 4 divisors (see below), whose sum is σ = 2762849460. Its totient is φ = 2368156656.

The previous prime is 2565503011. The next prime is 2565503069. The reversal of 2565503057 is 7503055652.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1455880336 + 1109622721 = 38156^2 + 33311^2 .

It is a cyclic number.

It is not a de Polignac number, because 2565503057 - 2¹⁶ = 2565437521 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2565503057.

It is not an unprimeable number, because it can be changed into a prime (2565502057) 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, 98673182 + ... + 98673207.

It is an arithmetic number, because the mean of its divisors is an integer number (690712365).

Almost surely, 2^2565503057 is an apocalyptic number.

It is an amenable number.

2565503057 is a deficient number, since it is larger than the sum of its proper divisors (197346403).

2565503057 is a wasteful number, since it uses less digits than its factorization.

2565503057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197346402.

The product of its (nonzero) digits is 157500, while the sum is 38.

The square root of 2565503057 is about 50650.7952257415. The cubic root of 2565503057 is about 1368.9602740495.

The spelling of 2565503057 in words is "two billion, five hundred sixty-five million, five hundred three thousand, fifty-seven".