7725525657 has 8 divisors (see below), whose sum is σ = 10302227520. Its totient is φ = 5149587120.

The previous prime is 7725525649. The next prime is 7725525659. The reversal of 7725525657 is 7565255277.

It is a happy number.

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

It is not a de Polignac number, because 7725525657 - 2³ = 7725525649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7725525659) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 166782 + ... + 208007.

It is an arithmetic number, because the mean of its divisors is an integer number (1287778440).

Almost surely, 2^7725525657 is an apocalyptic number.

It is an amenable number.

7725525657 is a deficient number, since it is larger than the sum of its proper divisors (2576701863).

7725525657 is a wasteful number, since it uses less digits than its factorization.

7725525657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381663.

The product of its digits is 5145000, while the sum is 51.

The square root of 7725525657 is about 87894.9694635592. The cubic root of 7725525657 is about 1976.8604512084.

The spelling of 7725525657 in words is "seven billion, seven hundred twenty-five million, five hundred twenty-five thousand, six hundred fifty-seven".