2525665537 has 8 divisors (see below), whose sum is σ = 2674993032. Its totient is φ = 2376422400.

The previous prime is 2525665531. The next prime is 2525665543. The reversal of 2525665537 is 7355665252.

It is a Cunningham number, because it is equal to 50256²+1.

It is an interprime number because it is at equal distance from previous prime (2525665531) and next prime (2525665543).

It can be written as a sum of positive squares in 4 ways, for example, as 1591690816 + 933974721 = 39896^2 + 30561^2 .

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 2525665537 - 2¹¹ = 2525663489 is a prime.

It is a super-3 number, since 3×2525665537³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2525665531) 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, 46837 + ... + 85117.

It is an arithmetic number, because the mean of its divisors is an integer number (334374129).

Almost surely, 2^2525665537 is an apocalyptic number.

It is an amenable number.

2525665537 is a deficient number, since it is larger than the sum of its proper divisors (149327495).

2525665537 is a wasteful number, since it uses less digits than its factorization.

2525665537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42179.

The product of its digits is 1890000, while the sum is 46.

The square root of 2525665537 is about 50256.0000099491. Note that the first 5 decimals coincide. The cubic root of 2525665537 is about 1361.8374703545.

The spelling of 2525665537 in words is "two billion, five hundred twenty-five million, six hundred sixty-five thousand, five hundred thirty-seven".