2025518861 has 8 divisors (see below), whose sum is σ = 2119514904. Its totient is φ = 1933588800.

The previous prime is 2025518843. The next prime is 2025518867. The reversal of 2025518861 is 1688155202.

It can be written as a sum of positive squares in 4 ways, for example, as 942121636 + 1083397225 = 30694^2 + 32915^2 .

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 2025518861 - 2⁶ = 2025518797 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2025518867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 514490 + ... + 518411.

It is an arithmetic number, because the mean of its divisors is an integer number (264939363).

Almost surely, 2^2025518861 is an apocalyptic number.

It is an amenable number.

2025518861 is a deficient number, since it is larger than the sum of its proper divisors (93996043).

2025518861 is a wasteful number, since it uses less digits than its factorization.

2025518861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1032991.

The product of its (nonzero) digits is 38400, while the sum is 38.

The square root of 2025518861 is about 45005.7647529736. The cubic root of 2025518861 is about 1265.2570441117.

The spelling of 2025518861 in words is "two billion, twenty-five million, five hundred eighteen thousand, eight hundred sixty-one".