2525857561 has 8 divisors (see below), whose sum is σ = 2568232448. Its totient is φ = 2483514000.

The previous prime is 2525857559. The next prime is 2525857601. The reversal of 2525857561 is 1657585252.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2525857561 - 2¹ = 2525857559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2525857261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200746 + ... + 212956.

It is an arithmetic number, because the mean of its divisors is an integer number (321029056).

Almost surely, 2^2525857561 is an apocalyptic number.

It is an amenable number.

2525857561 is a deficient number, since it is larger than the sum of its proper divisors (42374887).

2525857561 is a wasteful number, since it uses less digits than its factorization.

2525857561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15663.

The product of its digits is 840000, while the sum is 46.

The square root of 2525857561 is about 50257.9104320902. The cubic root of 2525857561 is about 1361.8719825583.

The spelling of 2525857561 in words is "two billion, five hundred twenty-five million, eight hundred fifty-seven thousand, five hundred sixty-one".