25852143869 has 4 divisors (see below), whose sum is σ = 27212783040. Its totient is φ = 24491504700.

The previous prime is 25852143787. The next prime is 25852143871. The reversal of 25852143869 is 96834125852.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25852143869 - 2²⁰ = 25851095293 is a prime.

It is a super-2 number, since 2×25852143869² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25852143869.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25852143269) 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 3 ways as a sum of consecutive naturals, for example, 680319557 + ... + 680319594.

It is an arithmetic number, because the mean of its divisors is an integer number (6803195760).

Almost surely, 2^25852143869 is an apocalyptic number.

It is an amenable number.

25852143869 is a deficient number, since it is larger than the sum of its proper divisors (1360639171).

25852143869 is a wasteful number, since it uses less digits than its factorization.

25852143869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1360639170.

The product of its digits is 4147200, while the sum is 53.

The spelling of 25852143869 in words is "twenty-five billion, eight hundred fifty-two million, one hundred forty-three thousand, eight hundred sixty-nine".