2565590957 has 4 divisors (see below), whose sum is σ = 2700622080. Its totient is φ = 2430559836.

The previous prime is 2565590953. The next prime is 2565591011. The reversal of 2565590957 is 7590955652.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2565590957 - 2² = 2565590953 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2565590899 and 2565590908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2565590953) 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, 67515533 + ... + 67515570.

It is an arithmetic number, because the mean of its divisors is an integer number (675155520).

Almost surely, 2^2565590957 is an apocalyptic number.

It is an amenable number.

2565590957 is a deficient number, since it is larger than the sum of its proper divisors (135031123).

2565590957 is a wasteful number, since it uses less digits than its factorization.

2565590957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135031122.

The product of its (nonzero) digits is 4252500, while the sum is 53.

The square root of 2565590957 is about 50651.6629243305. The cubic root of 2565590957 is about 1368.9759084405.

The spelling of 2565590957 in words is "two billion, five hundred sixty-five million, five hundred ninety thousand, nine hundred fifty-seven".