2565561525 has 12 divisors (see below), whose sum is σ = 4241728512. Its totient is φ = 1368299440.

The previous prime is 2565561517. The next prime is 2565561539. The reversal of 2565561525 is 5251655652.

It is not a de Polignac number, because 2565561525 - 2³ = 2565561517 is a prime.

It is a super-3 number, since 3×2565561525³ (a number of 29 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17103669 + ... + 17103818.

It is an arithmetic number, because the mean of its divisors is an integer number (353477376).

Almost surely, 2^2565561525 is an apocalyptic number.

2565561525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2565561525 is a deficient number, since it is larger than the sum of its proper divisors (1676166987).

2565561525 is a wasteful number, since it uses less digits than its factorization.

2565561525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34207500 (or 34207495 counting only the distinct ones).

The product of its digits is 450000, while the sum is 42.

The square root of 2565561525 is about 50651.3723900942. The cubic root of 2565561525 is about 1368.9706735383.

The spelling of 2565561525 in words is "two billion, five hundred sixty-five million, five hundred sixty-one thousand, five hundred twenty-five".