25160853861 has 72 divisors (see below), whose sum is σ = 43125893720. Its totient is φ = 14041589760.

The previous prime is 25160853787. The next prime is 25160853931. The reversal of 25160853861 is 16835806152.

25160853861 is a `hidden beast` number, since 2 + 5 + 1 + 608 + 5 + 38 + 6 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 6178903236 + 18981950625 = 78606^2 + 137775^2 .

It is not a de Polignac number, because 25160853861 - 2¹⁰ = 25160852837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25160855861) 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 71 ways as a sum of consecutive naturals, for example, 6467805 + ... + 6471693.

Almost surely, 2^25160853861 is an apocalyptic number.

It is an amenable number.

25160853861 is a deficient number, since it is larger than the sum of its proper divisors (17965039859).

25160853861 is a wasteful number, since it uses less digits than its factorization.

25160853861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4387 (or 4373 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The spelling of 25160853861 in words is "twenty-five billion, one hundred sixty million, eight hundred fifty-three thousand, eight hundred sixty-one".